| Abbott Street School | Worcester | Building | 1980 |
| Academie Brochu | Southbridge | Building | 1989 |
| Academy Street Educational Historic District | Fitchburg | District | 2025 |
| Adams, Benjamin, House | Uxbridge | Building | 1983 |
| Adams, Elwood, Store | Worcester | Building | 1980 |
| Adriatic Mills | Worcester | Building | 1980 |
| Ahern, Catherine, Three-Decker | Worcester | Building | 1990 |
| Albee, E., House | Uxbridge | Building | 1983 |
| Alden-Delahanty Block | Southbridge | Building | 1989 |
| Alden, William E., House | Southbridge | Building | 1989 |
| Aldrich, Daniel, Cottage and Sawmill | Uxbridge | Building | 1983 |
| Aldrich, J., House | Uxbridge | Building | 1984 |
| Aldrich, Nathan C., House and Resthaven Chapel | Mendon | Building | 2006 |
| Aldrich, S., House | Uxbridge | Building | 1983 |
| Aldrich, W., House | Uxbridge | Building | 1983 |
| Alexander, Arad, House | Worcester | Building | 1980 |
| Allen, Charles, House | Worcester | Building | 1980 |
| Allen, Ethan, House and Gun Shop | Grafton | Building | 1995 |
| American Antiquarian Society NHL | Worcester | Building | 1968 |
| American Optical Company Historic District | Southbridge | District | 2023 |
| Ammidown-Harding Farmhouse | Southbridge | Building | 1989 |
| Anderson, Ludwig, Three-Decker | Worcester | Building | 1990 |
| Armsby Block | Worcester | Building | 1980 |
| Ash Street School | Worcester | Building | 1980 |
| Ashburnham Center Historic District | Ashburnham | District | 1999 |
| Ashland Mill Tenement | Southbridge | Building | 1989 |
| Ashworth and Jones Factory | Worcester | Building | 1980 |
| Atherton Bridge | Lancaster | Structure | 1979 |
| Athol High School | Athol | Building | 2011 |
| Aurora Hotel | Worcester | Building | 1988 |
| Ayer Main Street Historic District | Ayer | District | 1989 |
| Babcock Block | Worcester | Building | 1980 |
| Bacon-Morse Historic District | Southbridge | District | 1989 |
| Baker, Peter, Three-Decker | Worcester | Building | 1990 |
| Baldwinville Village Historic District | Templeton | District | 1986 |
| Bancroft Hotel | Worcester | Building | 1980 |
| Bancroft Memorial Library | Hopedale | Building | 1999 |
| Bancroft Tower | Worcester | Site | 1980 |
| Bank Building | Uxbridge | Building | 1983 |
| Bannister, Emory, House | Worcester | Building | 1980 |
| Barker, Richard, Octagon House | Worcester | Building | 1980 |
| Barlin Acres | Boylston | Building | 1982 |
| Barnes-Hill House | Spencer | Building | 2016 |
| Barre Common District | Barre | District | 1976 |
| Bartlett's Bridge | Oxford | Structure | 2000 |
| Barton, Clara, Homestead | Oxford | Building | 1977 |
| Battelle, Marion, Three-Decker | Worcester | Building | 1990 |
| Beacon Street Firehouse | Worcester | Building | 1980 |
| Beaman Memorial Public Library | West Boylston | Building | 2016 |
| Beaver Street Historic District | Worcester | District | 1990 |
| Beechwood | Southbridge | Building | 1989 |
| Bentley, George, House | Worcester | Building | 1980 |
| Berlin Town Hall | Berlin | Building | 2011 |
| Bigelow Carpet Company Woolen Mills | Clinton | Building | 1983 |
| Bigelow Carpet Mill | Clinton | Building | 1978 |
| Bigelow Tavern Historic District | West Boylston | District | 1992 |
| Black Tavern | Dudley | Building | 1985 |
| Black Tavern (Boundary Increase) | Dudley | Building | 2010 |
| Blackstone Canal | Northbridge and vicinity | Structure | 1973 |
| Blackstone Canal Historic District | Blackstone | District | 1995 |
| Blackstone Manufacturing Company Historic District | Blackstone | District | 1995 |
| Blackstone Viaduct | Blackstone | Structure | 2002 |
| Bliss Building | Worcester | Building | 1980 |
| Blodgett, Lydia, Three-Decker | Worcester | Building | 1990 |
| Bloomingdale Firehouse | Worcester | Building | 1980 |
| Bloomingdale School | Worcester | Building | 1980 |
| Bolton Center Historic District | Bolton | District | 1997 |
| Borden-Pond House | Worcester | Building | 1980 |
| Bostrom, Eric, Three-Decker | Worcester | Building | 1990 |
| Boulevard Diner | Worcester | Building | 2000 |
| Bousquet, Henry, Three-Decker | Worcester | Building | 1990 |
| Bowers School | Clinton | Building | 1983 |
| Boyer, Alexis, House | Southbridge | Building | 1989 |
| Boynton and Windsor | Worcester | Building | 1980 |
| Bradley, J.D.C., House | Southborough | Building | 1999 |
| Brightside Apartments | Worcester | Building | 1980 |
| Brookfield Cemetery | Brookfield | Site | 2003 |
| Brookfield Common Historic District | Brookfield | District | 1990 |
| Brooks, John, House | Worcester | Building | 1980 |
| Brown-Davis-Frost Farm | Jefferson | Building | 1995 |
| Brown, E., House | Uxbridge | Building | 1983 |
| Building at 25-27 River Street | Southbridge | Building | 1989 |
| Building at 29-31 River Street | Southbridge | Building | 1989 |
| Building at 38-42 Worcester Street | Southbridge | Building | 1989 |
| Building at 52 Main Street | Southbridge | Building | 1989 |
| Bullard House | Berlin | Building | 2011 |
| Butler Block | Uxbridge | Building | 1983 |
| Calvinistic Congregational Church | Fitchburg | Building | 1979 |
| Cambridge Grant Historic District | Ashburnham | District | 2001 |
| Cambridge Street Firehouse | Worcester | Building | 1980 |
| Cambridge Street School | Worcester | Building | 1980 |
| Camp Atwater | North Brookfield | Building | 1982 |
| Carlson, Eric, Three-Decker | Worcester | Building | 1990 |
| Carpenter, George, House | Uxbridge | Building | 1983 |
| Castle Street Row | Worcester | Building | 1980 |
| Castle Street Row-Boundary Increase | Worcester | Building | 2001 |
| Cathedral of St. Paul | Worcester | Building | 1980 |
| Center Village District | Lancaster | District | 1977 |
| Central Mills Historic District | Southbridge | District | 1989 |
| Central Street Historic District | Millville | District | 2003 |
| Central Woolen Mills District | Uxbridge | District | 1984 |
| Centre Village Historic District | Southbridge | District | 1979 |
| Chadwick Square Diner | Worcester | Building | 2003 |
| Chadwick-Brittan House | Worcester | Building | 1980 |
| Chamberlain-Bordeau House | Southbridge | Building | 1989 |
| Chamberlain-Flagg House | Worcester | Building | 1980 |
| Chamberlain, Charles, House | Worcester | Building | 1980 |
| Chapin Block | Southbridge | Building | 1989 |
| Chapin, A., House | Uxbridge | Building | 1983 |
| Charlton Center Historic District | Charlton | District | 1995 |
| Cheney, Alpha M., House | Southbridge | Building | 1989 |
| Cheney, J. M., Rental House | Southbridge | Building | 1989 |
| Chestnut Hill Meetinghouse | Millville | Building | 1984 |
| Clapp, George, House | Grafton | Building | 1997 |
| Clark University | Worcester | Building | 1980 |
| Clarke-Glover Farmhouse | Southbridge | Building | 1989 |
| Cliff Cottage | Southbridge | Building | 1989 |
| Clinton Wire Cloth Company Historic District | Clinton | Building | 2024 |
| Cluett Peabody & Company | Leominster | Building | 1989 |
| Cobb, George, House | Worcester | Building | 1980 |
| Cole, E. Merritt, House | Southbridge | Building | 1989 |
| Colton's Block | Worcester | Building | 1980 |
| Comins-Wall House | Southbridge | Building | 1989 |
| Congregational Church | Southbridge | Building | 1989 |
| Cook, A. E., House | Uxbridge | Building | 1983 |
| Copeland, Samuel, House | Worcester | Building | 1980 |
| Corcoran School | Clinton | Building | 2000 |
| Corner Lunch | Worcester | Building | 2000 |
| Crabtree, Thomas, Three-Decker | Worcester | Building | 1990 |
| Crawford, Elias, House | Worcester | Building | 1980 |
| Crocker Field Historic District | Fitchburg | District | 2001 |
| Crompton Loom Works | Worcester | Building | 1980 |
| Crossman Bridge | Warren | Structure | 2010 |
| Crystal Street Historic District | Worcester | District | 1990 |
| Cummings, E. B., House | Southbridge | Building | 1989 |
| Dale and Ethan Allen Streets Historic District | Worcester | District | 2019 |
| Dana Common Historic and Archaeological District | Petersham | District | 2013 |
| Dani and Soldani Cabinet Makers and Wood Workers Factory | Southbridge | Building | 1989 |
| Daniel Holbrook Sr. House | Northhborough | Building | 2026 |
| Daniels, Frederick, House | Worcester | Building | 1980 |
| Dartmouth Street School | Worcester | Building | 1980 |
| Davis, Isaac, House | Worcester | Building | 1980 |
| Davis, Joseph, House | Worcester | Building | 1980 |
| Davis, Rodney, Three-Decker | Worcester | Building | 1990 |
| Davis, Wesley, Three-Decker | Worcester | Building | 1990 |
| Day Building | Worcester | Building | 1978 |
| Dean, Frank L. and Mabel H., House | Worcester | Building | 2002 |
| Dean, Mary, Three-Decker | Worcester | Building | 1990 |
| Deane, Francis, Cottage | Uxbridge | Building | 1983 |
| Delsignore, Louis, Three-Decker | Worcester | Building | 1990 |
| Dennison School House | Southbridge | Building | 1989 |
| Dewey Francis, House | Worcester | Building | 1980 |
| District Five Schoolhouse | Webster | Building | 1991 |
| District No. 4 School | Petersham | Building | 2016 |
| District No. 5 School | Petersham | Building | 2016 |
| District No. 5 School | Shrewsbury | Building | 2013 |
| Dodge Block and Sawyer Building, Bancroft Trust Building | Worcester | Building | 2002 |
| Dodge, Helen, Three-Decker | Worcester | Building | 1990 |
| Doran, Thomas F., Three-Decker | Worcester | Building | 1990 |
| Dowley-Taylor House | Worcester | Building | 1980 |
| Downing Street School | Worcester | Building | 1980 |
| Downtown Clinton Historic District | Clinton | District | 1985 |
| Drake, Frances H. and Jonathan, House | Leominster | Building | 2008 |
| Dresser, Sylvester, House | Southbridge | Building | 1989 |
| Drew, Elvira, Three-Decker | Worcester | Building | 1990 |
| Duck Mill | Fitchburg | Building | 1985 |
| Dudley Hill Historic District | Dudley | District | 2019 |
| Duke, Philip, Three-Decker | Worcester | Building | 1990 |
| Dunbar-Vinton House | Southbridge | Building | 1989 |
| Duprey Building | Worcester | Building | 2019 |
| Durfee, Henry E., Farmhouse | Southbridge | Building | 1989 |
| Dworman, David, Three-Decker | Worcester | Building | 1990 |
| Eagleville Historic District | Holden | District | 2010 |
| Earl Company Factory | Leominster | Building | 2025 |
| East Blackstone Friends Meetinghouse | Blackstone | Building | 1995 |
| East Blackstone Village Historic District | Blackstone | District | 1995 |
| East End Historic District | Bolton | District | 2025 |
| East Main Street-Cherry Street Historic District | Spencer | District | 1996 |
| East Main-Cherry Street Historic District (Boundary Increase) | Spencer | District | 2003 |
| East Princeton Village Historic District | Princeton | District | 2004 |
| East Worcester School-Norcross Factory | Worcester | Building | 1980 |
| Eastwood Cemetery (Additional Documentation) | Lancaster | District | 2024 |
| Eddy Block | Webster | Building | 1980 |
| Elizabeth Street School | Worcester | Building | 1980 |
| Elm Hill Farm Historic District | Brookfield | District | 1991 |
| Elm Park | Worcester | Structure | 1970 |
| Elm Street Fire House | Southbridge | Building | 1989 |
| Elm Street Fire Station | Gardner | Building | 1980 |
| Elm Street Historic District | Worcester | District | 1990 |
| Emmanuel Baptist | Worcester | Building | 1980 |
| English High School | Worcester | Building | 1980 |
| Enterprise Building | Worcester | Building | 1980 |
| Erikson, Knut, Three-Decker | Worcester | Building | 1990 |
| Euclid Avenue-Montrose Street Historic District | Worcester | District | 1990 |
| Evangelical Free Church | Southbridge | Building | 1989 |
| Fairlawn | Worcester | Building | 1980 |
| Farnum Block | Uxbridge | Building | 1983 |
| Farnum, Coronet John, House | Uxbridge | Building | 1980 |
| Farnum, Moses, House | Uxbridge | Building | 1983 |
| Farnum, R., House | Uxbridge | Building | 1983 |
| Farnum, William and Mary, House | Uxbridge | Building | 1984 |
| Farnum's Gate Historic District | Blackstone | District | 1995 |
| Farnumsville Historic District | Grafton | District | 1996 |
| Fay Club | Fitchburg | Building | 1978 |
| Fay Street Historic District | Worcester | District | 1990 |
| Felton Street School | Hudson | Building | 1986 |
| Fernside-Vacation House for Working Girls | Princeton | Building | 2002 |
| First Baptist Church of Northborough | Northborough | Building | 2016 |
| First Church of Christ, Lancaster NHL | Lancaster | Building | 1970 |
| First Methodist Church | Clinton | Building | 1990 |
| First Minister's House | Gardner | Building | 1979 |
| First Presbyterian Society Meeting House | Millbury | Building | 2010 |
| Fisher, Nathan, House | Westborough | Building | 1980 |
| Fisherville Historic District | Grafton | District | 1996 |
| Fitch, C.H., House | Worcester | Building | 1980 |
| Fitchburg Historical Society | Fitchburg | Building | 2003 |
| Fitchburg Yarn Mill | Fitchburg | Building | 2016 |
| Flagg, Amos, House | Worcester | Building | 1980 |
| Flagg, Benjamin, House | Worcester | Building | 1980 |
| Flagg, Levi, Three-Decker | Worcester | Building | 1990 |
| Fobes-O'Donnell House | Oakham | Building | 2018 |
| Fontaine, George, Three-Decker | Worcester | Building | 1990 |
| Forbes, William Trowbridge, House | Worcester | Building | 1980 |
| Forest Hill Cottage | Worcester | Building | 1980 |
| Foster, Jedediah, Homesite | West Brookfield | Site | 2013 |
| Founder's Hall | Lancaster | Building | 1980 |
| Four Corners-Goodnow Farm Historic District | Princeton | District | 2015 |
| Freegrace Marble Farm Historic District | Sutton | District | 1989 |
| Freeland Street School | Worcester | Building | 1980 |
| Friberg, Andrew, Three-Decker | Worcester | Building | 1990 |
| Friends Meetinghouse | Uxbridge | Building | 1974 |
| Fruitlands NHL | Harvard | District | 1974 |
| Fruitlands Museums Historic District | Harvard | District | 1997 |
| G.A.R. Hall | Worcester | Building | 1975 |
| Gabriel, George, House | Worcester | Building | 1980 |
| Gale, George, House | Worcester | Building | 1980 |
| Garbose Building | Gardner | Building | 1983 |
| Gardner News Building | Gardner | Building | 1979 |
| Gardner Uptown Historic District | Gardner | District | 1999 |
| Gay Farm | Petersham | Building | 1977 |
| Gay, Rev. Samuel, House | Hubbardston | Building | 1997 |
| Giguere, Thomas, Three-Decker | Worcester | Building | 1990 |
| Gilbertville Historic District | Hardwick | District | 1991 |
| Gillon Block | Milford | Building | 1982 |
| Gilman Block | Worcester | Building | 2000 |
| Gleason, James, Cottage | Southbridge | Building | 1989 |
| Globe Village Fire House | Southbridge | Building | 1989 |
| Glover Street Historic District | Southbridge | District | 1989 |
| Goddard House | Worcester | Building | 1980 |
| Goddard Rocket Launching Site NHL | Auburn | Site | 1966 |
| Goddard, Harry, House | Worcester | Building | 1980 |
| Goldberg Building | Worcester | Building | 2007 |
| Gough, John B., House NHL | Boylston | Building | 1974 |
| Goulding, Henry, House | Worcester | Building | 1980 |
| Goulding, W.H., House | Worcester | Building | 1980 |
| Grafton Common Historic District | Grafton | District | 1988 |
| Grafton Inn | Grafton | Building | 1980 |
| Grafton Street School | Worcester | Building | 1980 |
| Granite Store | Uxbridge | Building | 1983 |
| Green Hill Park Shelter | Worcester | Structure | 1980 |
| Greendale Branch Library | Worcester | Building | 1980 |
| Greendale Village Improvement Society Building | Worcester | Building | 1976 |
| Grove Street School | Spencer | Building | 1996 |
| Gullberg, Evert, Three-Decker | Worcester | Building | 1990 |
| Hadley Furniture Company Building | Worcester | Building | 2011 |
| Hadley, Gilbert, Three-Decker | Worcester | Building | 1990 |
| Hall, Charles A., Three-Decker | Worcester | Building | 1990 |
| Hall, S.A., House | Uxbridge | Building | 1983 |
| Hamilton Mill Brick House | Southbridge | Building | 1989 |
| Hamilton Mill-West Street Factory Housing | Southbridge | Building | 1989 |
| Hamilton Millwright-Agent's House | Southbridge | Building | 1989 |
| Hamilton Woolen Company Historic District | Southbridge | District | 1989 |
| Hammond Heights | Worcester | District | 1980 |
| Hammond Organ Factory | Worcester | Building | 1980 |
| Harding-Winter Street Manufacturing District | Worcester | District | 1980 |
| Hardwick Village Historic District | Hardwick | District | 1991 |
| Harrington, Theodore, House | Southbridge | Building | 1989 |
| Harris-Merrick House | Worcester | Building | 1980 |
| Hartwell, George H., House | Southbridge | Building | 1989 |
| Hartwell, Samuel C., House | Southbridge | Building | 1989 |
| Harvard Center Historic District | Harvard | District | 1997 |
| Harvard Shaker Village Historic District | Harvard | District | 1989 |
| Hassanamisco Reservation (Additional Documentation) | Grafton | Site | 2011 |
| Hastings, Stephen, House | Sterling | Building | 2005 |
| Hastins, John, Cottage | Worcester | Building | 1980 |
| Hayward Mill | Douglas | District | 1991 |
| Hayward, William, House | Uxbridge | Building | 1983 |
| Heywood-Wakefield Company Complex | Gardner | Building | 1983 |
| Heywood, Levi, Memorial Library Building | Gardner | Building | 1979 |
| Higgins Armory Museum | Worcester | Building | 1980 |
| Higgins, Aldus Chapin, House | Worcester | Building | 1980 |
| High-School Streets Historic District | Southbridge | District | 1989 |
| Hirst, Samuel, Three-Decker | Worcester | Building | 1990 |
| Hobbs, Marcus, House | Worcester | Building | 1980 |
| Hodgson, William, Two-Family House | Southbridge | Building | 1989 |
| Hogg, William, House | Worcester | Building | 1980 |
| Holbrook, Sylvanus, House | Uxbridge | Building | 1983 |
| Holden Center Historic District | Holden | District | 1977 |
| Holden Center Historic District (Boundary Increase) | Holden | District | 1995 |
| Holland-Towne House | Petersham | Building | 1990 |
| Holy Cross College | Worcester | Building | 1980 |
| Holy Name of Jesus Complex | Worcester | Building | 1988 |
| Hope Cemetery | Worcester | Site | 1997 |
| Hopedale Village Historic District | Hopedale | District | 2002 |
| Houghton Street Historic District | Worcester | District | 1990 |
| House at 18 Walnut Street | Southbridge | Building | 1989 |
| House at 3 Dean Street | Southbridge | Building | 1989 |
| House at 34 Benefit Street | Southbridge | Building | 1989 |
| House at 59-63 Crystal Street | Southbridge | Building | 1989 |
| House at 64 Main Street | Southbridge | Building | 1989 |
| House at 70-72 Main Street | Southbridge | Building | 1989 |
| House at 91 Coombs Street | Southbridge | Building | 1989 |
| Hubbard-Dawson House | Holden | Building | 1995 |
| Hubbardston Public Library | Hubbardston | Building | 1998 |
| Hubbardston Town Common Historic District | Hubbardston | District | 2000 |
| Hudson House | Oxford | Building | 1978 |
| Huguenot Fort | Oxford | Site | 1988 |
| Hunt, Daniel, Three-Decker | Worcester | Building | 1990 |
| Hunt, David, Three-Decker | Worcester | Building | 1990 |
| I00F Building | Worcester | Building | 1980 |
| Indian Cemetery, Old | West Brookfield | Site | 2006 |
| Indian Hill School | Worcester | Building | 2022 |
| Indian Hill-North Village | Worcester | District | 1980 |
| Ingleside Avenue Historic District | Worcester | District | 1990 |
| Ingraham, Harry B., Three-Decker | Worcester | Building | 1990 |
| Institutional District | Worcester | District | 1980 |
| Ironstone Mill Housing and Cellar Hole | Uxbridge | Building | 1983 |
| J. R. Torrey Razor Co. and J. R. Torrey & Co. Manufacturing Facility | Worcester | Building | 2024 |
| Jenckes, E. N., Store | Douglas | Building | 1988 |
| Jewett Piano Company Building | Leominster | Building | 2019 |
| Johnson, Edwin, Three-Decker | Worcester | Building | 1990 |
| Johnson, John and Edward, Three-Decker | Worcester | Building | 1990 |
| Johnson, John, Three-Decker | Worcester | Building | 1990 |
| Johnson, Paul, Three-Decker | Worcester | Building | 1990 |
| Judson-Litchfield House | Southbridge | Building | 1989 |
| Judson-Taft House | Uxbridge | Building | 1983 |
| Junction Shop and Herman Street District (Additional Documentation) | Worcester | District | 1980 |
| Kaller, Erick, Three-Decker | Worcester | Building | 1990 |
| Kaller, Erick, Three-Decker | Worcester | Building | 1990 |
| Katz and Leavitt Apartment House | Worcester | Building | 1980 |
| Kensely, J., House | Uxbridge | Building | 1983 |
| Kinney, A., House | Southbridge | Building | 1989 |
| Knollwood | Worcester | District | 1980 |
| Knowles, Lucius, House | Worcester | Building | 1980 |
| Knowlton Hat Factory | Upton | Building | 1982 |
| LaCroix-Mosher House | Southbridge | Building | 1989 |
| Lake Street Fire Station | Gardner | Building | 1980 |
| Lancaster Industrial School for Girls | Lancaster | District | 1976 |
| Lancaster Mills | Clinton | District | 2010 |
| Lane, Anthony, House | Lancaster | Building | 1976 |
| Larchmont | Worcester | Building | 1980 |
| LaRochelle, Napoleon, Two-Family House | Southbridge | Building | 1989 |
| Larson, Swan, Three-Decker | Worcester | Building | 1990 |
| Legg, John, House | Worcester | Building | 1980 |
| Leominster High School | Leominster | Building | 2021 |
| Levenson, Morris, Three-Decker | Worcester | Building | 1990 |
| Liberty Farm NHL | Worcester | Building | 1974 |
| Lincoln Estate-Elm Park Historic District | Worcester | District | 1980 |
| Lincoln, Gov. Levi, House | Worcester | Building | 1980 |
| Linwood Historic District | Northbridge | District | 1989 |
| Lothrop, Joseph, House | Shrewsbury | Building | 1980 |
| Lower Pleasant Street District | Worcester | District | 1980 |
| Lumb, Thomas, Three-Decker | Worcester | Building | 1990 |
| Lumb, Thomas, Three-Decker | Worcester | Building | 1990 |
| Lundberg, Charles, Three-Decker | Worcester | Building | 1990 |
| Lunenburg Historic District | Lunenburg | District | 1988 |
| Lyman School for Boys | Westborough | District | 1994 |
| Magnuson, Charles, Three-Decker | Worcester | Building | 1990 |
| Main and Franklin Streets Historic District | Worcester | District | 2022 |
| Main Street and Murray Avenue Historic District | Worcester | District | 2022 |
| Main Street Historic District | Webster | District | 1982 |
| Main Street Historic District | Millville | District | 2006 |
| Malvern Road School | Worcester | Building | 1984 |
| Manchaug Village Historic District | Sutton | District | 2018 |
| Manning-Ball House | Jefferson | Building | 1995 |
| Maple Street Historic District | Southbridge | District | 1989 |
| Maples Cottage | Westborough | Building | 1980 |
| Marble, Jerome, House | Worcester | Building | 1980 |
| Marcy, Mrs. R., House | Southbridge | Building | 1989 |
| Mark, John, Three-Decker | Worcester | Building | 1990 |
| Marlborough Brook Filter Beds | Marlborough | Structure | 1990 |
| Marsh, Alexander, House | Worcester | Building | 1980 |
| Mary E. Wells School | Southbridge | Building | 2023 |
| Masonic Temple | Worcester | Building | 1980 |
| Massachusetts Avenue Historic District | Worcester | District | 1971 |
| Massad, Anthony, Three-Decker | Worcester | Building | 1990 |
| Matthews Fulling Mill Site | North Brookfield | Site | 1975 |
| May Street Historic District | Worcester | District | 1980 |
| McCafferty, Elizabeth, Three-Decker | Worcester | Building | 1990 |
| McCarron, Andrew, Three-Decker | Worcester | Building | 1990 |
| McDermott, John B., Three-Decker | Worcester | Building | 1990 |
| McFarland, William, House | Worcester | Building | 1980 |
| McGrath, Patrick, Three-Decker | Worcester | Building | 1990 |
| McGuinness, Patrick, Three-Decker | Worcester | Building | 1990 |
| McKinstry, William, Farmhouse | Southbridge | Building | 1989 |
| McKinstry, William, Jr., House | Southbridge | Building | 1989 |
| McPartland, Frank, Three-Decker | Worcester | Building | 1990 |
| McPartland, James, Three-Decker | Worcester | Building | 1990 |
| Mechanics Hall | Worcester | Building | 1972 |
| Mechanics' Hall District | Worcester | District | 1980 |
| Memorial Hall | Milford | Building | 1985 |
| Mendon Center Historic District | Mendon | District | 2003 |
| Merrill Double House | Worcester | Building | 1980 |
| Middle Cemetery | Lancaster | Site | 2019 |
| Miles, Charles, House | Worcester | Building | 1980 |
| Milford Town Hall | Milford | Building | 1977 |
| Miss Toy Town Diner | Gardner | Building | 2003 |
| Miss Worcester Diner | Worcester | Building | 2003 |
| Mission Chapel | Worcester | Building | 1980 |
| Montvale | Worcester | District | 1980 |
| Monument Park Historic District | Fitchburg | District | 1978 |
| Monument Square Historic District | Leominster | District | 1982 |
| Moore State Park Historic District | Paxton | District | 2004 |
| Moore, Jesse, House | Worcester | Building | 1980 |
| Moran Square Historic District | Fitchburg | District | 2018 |
| Morse, H., House | Southbridge | Building | 1989 |
| Mount Vernon Cemetery | West Boylston | Site | 2008 |
| Munroe, Sarah, Three-Decker | Worcester | Building | 1990 |
| Murdock School | Winchendon | Building | 1988 |
| Murphy, Patrick, Three-Decker | Worcester | Building | 1990 |
| Nelson, Christina, Three-Decker | Worcester | Building | 1990 |
| New York, New Haven & Hartford Passenger Depot | Southbridge | Building | 1989 |
| Newton, Azariah, House | Milford | Building | 1999 |
| Newton, Charles, House | Worcester | Building | 1980 |
| Newton, S.D., House | Worcester | Building | 1980 |
| No. 4 Schoolhouse | Barre | Building | 1988 |
| Norcross Brothers Houses | Worcester | Building | 1980 |
| North Avenue Rural Historic District | Mendon | District | 2003 |
| North Brookfield Town House | North Brookfield | Building | 2001 |
| North Burial Ground (Additional Documentation) | Lancaster | Site | 2024 |
| North Uxbridge School | Uxbridge | Building | 1983 |
| North Village Cemetery | Lancaster | Site | 2024 |
| North Village Historic District | Lancaster | District | 1977 |
| North Worcester Aid Society | Worcester | Building | 1980 |
| Northside Village Historic District | Charlton | District | 1977 |
| Notre Dame Catholic Church | Southbridge | Building | 1989 |
| O'Brien, Richard, Three-Decker | Worcester | Building | 1990 |
| O'Connor, James-John Trybowski Three-Decker | Worcester | Building | 1990 |
| O'Connor, James, Three-Decker | Worcester | Building | 1990 |
| Oakdale Village Historic District | West Boylston | District | 1996 |
| Oakes, J. J., House | Southbridge | Building | 1989 |
| Oakham Center Historic District | Oakham | District | 2020 |
| Odd Fellows' Home | Worcester | Building | 1980 |
| Old Centre Historic District | Winchendon | District | 1987 |
| Old Common Burial Ground | Lancaster | Site | 2024 |
| Old Douglas Center Historic District | Douglas | District | 2001 |
| Old Settlers' Burying Ground | Lancaster | Site | 2019 |
| Old State Mutual Building | Worcester | Building | 1980 |
| Old Stone Church | West Boylston | Building | 1973 |
| Old Town Hall | Athol | Building | 1987 |
| Olney Cook Artisan Shop | Mendon | Building | 2019 |
| Osgood Bradley Building | Worcester | Building | 2018 |
| Oxford Main Street Historic District | Oxford | District | 2011 |
| Oxford-Crown Extension District | Worcester | District | 1980 |
| Oxford-Crown Historic District | Worcester | District | 1976 |
| Paddock Farm | Holden | Building | 1996 |
| Paine, Timothy, House | Worcester | Building | 1976 |
| Pan Burying Ground | Bolton | Site | 2007 |
| Pan Historic District | Bolton | District | 2018 |
| Park Building | Worcester | Building | 1980 |
| Parkhill Mill | Fitchburg | Building | 2008 |
| Partridge, Jabez, Homestead | Gardner | Building | 1979 |
| Pequoig Hotel | Athol | Building | 1978 |
| Perry Avenue Historic District | Worcester | District | 1990 |
| Petersham Common Historic District | Petersham | District | 1982 |
| Petterson, Lars-Adolph Carlson Three-Decker | Worcester | Building | 1990 |
| Petterson, Lars-Fred Gurney Three-Decker | Worcester | Building | 1990 |
| Petterson, Lars-Silas Archer Three-Decker | Worcester | Building | 1990 |
| Petterson,Lars-James Reidy Three-Decker | Worcester | Building | 1990 |
| Phillips, E. M., House | Southbridge | Building | 1989 |
| Phillipston Center Historic District | Phillipston | District | 1999 |
| Pierce, Sylvester K., House | Gardner | Building | 2022 |
| Pilgrim Congregational Church | Worcester | Building | 1980 |
| Pine Grove Cemetery | Leominster | Site | 2008 |
| Pleasant Street Firehouse | Worcester | Building | 1980 |
| Pleasant Street School | Spencer | Building | 1996 |
| Plimpton, Simon, Farmhouse | Southbridge | Building | 1989 |
| Poli's Palace Theater | Worcester | Building | 2011 |
| Ponakin Bridge | Lancaster | Structure | 1979 |
| Prentiss, Addison, House | Worcester | Building | 1980 |
| Prescott Town House | Petersham | Building | 1989 |
| Princeton Center Historic District | Princeton | District | 1999 |
| Princeton Center Historic District (Boundary Increase) | Princeton | District | 2006 |
| Printers Building, The | Worcester | Building | 2020 |
| Prospect Heights Historic District | Milford | District | 1990 |
| Providence Street Firehouse | Worcester | Building | 1980 |
| Providence Street Historic District | Worcester | District | 1990 |
| Provost, Arthur, Three-Decker | Worcester | Building | 1990 |
| Putnam, Gen. Rufus, House NHL | Rutland | Building | 1972 |
| Putnam, Otis, House | Worcester | Building | 1980 |
| Quinepoxet River Bridge | West Boylston | Structure | 1990 |
| Quinsigamond Branch Library | Worcester | Building | 1980 |
| Quinsigamond Firehouse | Worcester | Building | 1980 |
| Raymond, Tilley, House | Worcester | Building | 1980 |
| Reed, Frank, Three-Decker | Worcester | Building | 1990 |
| Rice, Ezra, House | Worcester | Building | 1980 |
| Richard, Stephen, House | Southbridge | Building | 1989 |
| Richardson, Dexter, House | Uxbridge | Building | 1983 |
| Richardson, Joseph, House | Uxbridge | Building | 1983 |
| Richmond, Willard, Apartment Block | Worcester | Building | 1985 |
| Rider Tavern | Charlton | Building | 1976 |
| Ridyard, Albert, Three-Decker | Worcester | Building | 1990 |
| Ridyard, B. E., Three-Decker | Worcester | Building | 1990 |
| Riordan, John, Three-Decker | Worcester | Building | 1990 |
| Rivulet Mill Complex | Uxbridge | Building | 1983 |
| Rock Castle School | Webster | Building | 1989 |
| Rockdale Common Housing District | Northbridge | District | 1983 |
| Rogers House | Holden | Building | 1982 |
| Rogerson's Village Historic District | North Uxbridge | District | 1971 |
| Royalston Common Historic District | Royalston | District | 1976 |
| Roynane, Catharine, Three-Decker | Worcester | Building | 1990 |
| Ruggles, Draper, House | Worcester | Building | 1980 |
| Rural Glen Cemetery | Hubbardston | Site | 2020 |
| Russell Corner Historic District | Princeton | District | 2006 |
| Russell, The | Worcester | Building | 1985 |
| Sacred Heart Church Historic District | Southbridge | District | 1989 |
| Safety Fund National Bank | Fitchburg | Building | 2009 |
| Saint Joseph's Home for Working Girls | Worcester | Building | 2021 |
| Salisbury Factory Building | Worcester | Building | 1980 |
| Salisbury Factory Building | Worcester | Building | 1980 |
| Salisbury House | Worcester | Building | 1975 |
| Salisbury Mansion and Store | Worcester | Building | 1975 |
| Sawyer Homestead | Sterling | Building | 2000 |
| Sayles, Richard, House | Uxbridge | Building | 1983 |
| Schofield, James, House | Worcester | Building | 1980 |
| Searles Hill Cemetery | Phillipston | Site | 2011 |
| Shaarai Torah Synagogue | Worcester | Building | 1990 |
| Shattuck, Moody, House | Worcester | Building | 1980 |
| Shea, Bridget, Three-Decker | Worcester | Building | 1990 |
| Shrewsbury Historic District | Shrewsbury | District | 1976 |
| Shumway Block | Webster | Building | 1980 |
| Simpson, Clara, Three-Decker | Worcester | Building | 1990 |
| Slater Building | Worcester | Building | 1980 |
| Smith-Lyon Farmhouse | Southbridge | Building | 1989 |
| Smith-Thaxter-Merrifield House | Worcester | Building | 1980 |
| Smith, Ellen M., Three-Decker | Worcester | Building | 1990 |
| Smith, Elliot, House | Worcester | Building | 1980 |
| Smith, F.W., Silver Company | Gardner | Building | 1979 |
| Soho Cottage | Worcester | Building | 1980 |
| South Lancaster Engine House | South Lancaster | Building | 1976 |
| South Union School | Southborough | Building | 2011 |
| South Unitarian | Worcester | Building | 1980 |
| South Worcester Branch Library | Worcester | Building | 1980 |
| Southborough Center Historic District | Southborough | District | 2021 |
| Southbridge Town Hall | Southbridge | Building | 1987 |
| Southbridge-Sargent Manufacturing District | Worcester | District | 1980 |
| Southwick-Daniels Farm | Blackstone | District | 1995 |
| Southwick, Elisha, House | Uxbridge | Building | 1983 |
| Southwick, Israel, House | Uxbridge | Building | 1983 |
| Spaulding Block | Webster | Building | 1980 |
| Spencer Town Center Historic District | Spencer | District | 1986 |
| Spencer Town Center Historic District (Boundary Increase) | Spencer | District | 2003 |
| Spurr, John, House | Charlton | Building | 1976 |
| St. George's Greek Orthodox Church | Southbridge | Building | 1989 |
| St. John`s Catholic Church | Worcester | Building | 1980 |
| St. Marks | Worcester | Building | 1980 |
| St. Matthews | Worcester | Building | 1980 |
| St. Peter's Roman Catholic Church-St. Mary's School | Southbridge | Building | 1989 |
| St. Peters Catholic Church | Worcester | Building | 1980 |
| Stark, Edward, House | Worcester | Building | 1980 |
| Sterling Center Historic District | Sterling | District | 1988 |
| Stevens Linen Works Historic District | Dudley | District | 2010 |
| Stevens, Daniel, House | Worcester | Building | 1980 |
| Stevens' Building | Worcester | Building | 1980 |
| Still River Baptist Church | Harvard | Building | 1996 |
| Stoliker, Edna, Three-Decker | Worcester | Building | 1990 |
| Stone, Edward, Three-Decker | Worcester | Building | 1990 |
| Stone, Joseph, House | Auburn | Building | 1986 |
| Stone, Lorenzo R., House | Southbridge | Building | 1989 |
| Stone, Lucy, Home Site | West Brookfield | Site | 2021 |
| Stony Farm | Holden | Building | 1995 |
| Sturbridge Common Historic District | Sturbridge | District | 1977 |
| Sturtevant, Leonard, House | Worcester | Building | 1980 |
| Sumner, George, House | Southbridge | Building | 1989 |
| Sutton Center Historic District | Sutton | District | 2001 |
| Swift, D. Wheeler, House | Worcester | Building | 1980 |
| Taft Brothers Block | Uxbridge | Building | 1983 |
| Taft, Aaron, House | Uxbridge | Building | 1983 |
| Taft, Bazaleel, Jr., House and Law Office | Uxbridge | Building | 1983 |
| Taft, George, House | Uxbridge | Building | 1983 |
| Taft, Hon. Bazaleel, House | Uxbridge | Building | 1983 |
| Taft, Moses, House | Uxbridge | Building | 1983 |
| Taft, Samuel, House | Uxbridge | Building | 1983 |
| Taft, Zadock, House | Uxbridge | Building | 1983 |
| Tantiusques Reservation | Sturbridge | Site | 1983 |
| Tapin, Eugene, House | Southbridge | Building | 1989 |
| Ted's Diner | Milford | Building | 2000 |
| Templeton Common Historic District | Templeton | District | 1983 |
| Templeton Farm Colony | Templeton | District | 1994 |
| Thayer, Benjamin, House | Blackstone | Building | 2009 |
| Thayer, Nathaniel, Estate | Lancaster | Building | 1976 |
| Thom Block | Milford | Building | 1983 |
| Thompson School | Webster | Building | 1989 |
| Thomson, C.R., House and Barn | Uxbridge | Building | 1983 |
| Thule-Plummer Buildings | Worcester | Building | 2011 |
| Tiffany-Leonard House | Southbridge | Building | 1989 |
| Tobin's Beach Site | Brookfield | Site | |
| Tobin's Beach Site (Boundary Increase) | Brookfield | Site | 2018 |
| Tower, Horatio, House | Worcester | Building | 1980 |
| Troupes, John, Three-Decker | Worcester | Building | 1990 |
| Tuttle Square School | Auburn | Building | 2002 |
| Twinehurst American Optical Company Neighborhood | Southbridge | District | 1989 |
| U.S. Post Office and Courthouse | Worcester | Building | 2011 |
| Union Congregational Church | Worcester | Building | 1980 |
| Union Station | Worcester | Building | 1980 |
| Upper Chapin Street Historic District | Southbridge | District | 1989 |
| Upsala Street School | Worcester | Building | 1980 |
| Upton Center Historic District | Upton | District | 2015 |
| Upton State Forest-Civilian Conservation Corps Resources Historic District | Upton | District | 2014 |
| Upton Town Hall | Upton | Building | 1999 |
| US Post Office-Millbury Main | Millbury | Building | 1987 |
| US Post Office-Whitinsville Main | Northbridge | Building | 1987 |
| Uxbridge Common District | Uxbridge | District | 1984 |
| Uxbridge Passenger Depot | Uxbridge | Building | 1983 |
| Uxbridge Town Hall | Uxbridge | Building | 1983 |
| Vendome, The, and the St. Ives | Worcester | Building | 1990 |
| View Street Historic District | Worcester | District | 1990 |
| Vinton-Boardman Farmhouse | Southbridge | Building | 1989 |
| Vinton-Torrey House | Southbridge | Building | 1989 |
| Vintonville Historic District | Westborough | District | 2006 |
| W. S. Reed Toy Company-Wachusett Shirt Company Historic District | Leominster | District | 2021 |
| Wachusett Aqueduct Linear District | Clinton | District | 1990 |
| Wachusett Dam Historic District | Clinton | District | 1990 |
| Wachusett Shirt Company | Leominster | Building | 1982 |
| Waldo Street Police Station | Worcester | Building | 1980 |
| Ward Street School-Millbury Street | Worcester | Building | 1980 |
| Ward, Gen. Artemas, Homestead | Shrewsbury | Building | 1976 |
| Warren First Congregational Church-Federated Church | Warren | Building | 2004 |
| Warren Public Library | Warren | Building | 2000 |
| Warren Town Hall | Warren | Building | 2001 |
| Warren, Frederick Fiske and Gretchen Osgood, House | Harvard | Building | 1996 |
| Warren, Jonah, House | Westborough | Building | 1998 |
| Washburn and Moen North Works District | Worcester | District | 1980 |
| Washburn Square-Leicester Common Historic District (Additional Documentation) | Leicester | District | 2006 |
| Waters Farm | Sutton | Building | 1985 |
| Waters, Asa, Mansion | Millbury | Building | 1978 |
| Waucantuck Mill Complex | Uxbridge | Building | 1984 |
| WCIS Bank | Worcester | Building | 1980 |
| Webster Municipal Buildings Historic District | Webster | District | 2012 |
| Webster Street Firehouse | Worcester | Building | 1980 |
| Wellington Piano Case Company Building | Leominster | Building | 1984 |
| Wellington Street Apartment House District | Worcester | District | 1980 |
| Wells, George B. and Ruth D., House | Southbridge | Building | 1989 |
| Wells, H. C., Double House | Southbridge | Building | 1989 |
| Wells, John M., House | Southbridge | Building | 1989 |
| Wescott, John, Three-Decker | Worcester | Building | 1990 |
| Wesson, Franklin, House | Worcester | Building | 1980 |
| West Brick School | Oakham | Building | 2011 |
| West Brookfield Center Historic District | West Brookfield | District | 1990 |
| West Brookfield Center Historic District (Boundary Increase) | West Brookfield | District | 2006 |
| West Gardner Square Historic District | Gardner | District | 1985 |
| West Main Street Historic District | Westborough | District | 1987 |
| West Main Street Historic District (Boundary Increase II) | Westborough | District | 2006 |
| West Main Street Historic District (Boundary Increase III) | Westborough | District | 2009 |
| West Main Street Historic District (Boundary Increase) | Westborough | District | 1990 |
| West Sutton Historic District | Sutton | District | 2001 |
| West Village Historic District | Princeton | District | 2009 |
| Westborough State Hospital | Westborough | District | 1994 |
| Westminster Village-Academy Hill Historic District | Westminster | District | 1983 |
| Wheeler, Albert H., House | Southbridge | Building | 1989 |
| Wheelockville District | Uxbridge | District | 1984 |
| Whipple, A., House | Uxbridge | Building | 1983 |
| Whitcomb House | Worcester | Building | 1977 |
| Whitcomb Inn and Farm | Bolton | Building | 2002 |
| Whitcomb Mansion | Worcester | Building | 1980 |
| White Homestead-Salem Cross Inn | West Brookfield | Building | 1975 |
| Whitinsville Historic District | Northbridge | District | 1983 |
| Whitmore, Enoch, House | Ashburnham | Building | 2008 |
| Whitney & Company | Leominster | Building | 1989 |
| Whitney Tavern | Templeton and Gardner | Building | 1996 |
| Whitney, F. A., Carriage Company Complex Historic District | Leominster | District | 1988 |
| Whittall Mills | Worcester | District | 1980 |
| Wickaboag Valley Historic District | West Brookfield | District | 2000 |
| Wight, Oliver, House | Sturbridge | Building | 1982 |
| Willard House and Clock Museum | Grafton | Building | 1982 |
| Willard-Fisk House | Holden | Building | 1996 |
| Williams, N., House | Uxbridge | Building | 1983 |
| Winchendon Village Historic District | Winchendon | District | 1993 |
| Windsor Court Historic District | Southbridge | District | 1989 |
| Wood, Ahijah, House | Westminster | Building | 1987 |
| Wood, Ezra-Levi Warner Place | Westminster | Building | 1983 |
| Wood, Nathan, House | Westminster | Building | 1987 |
| Woodford Street Historic District | Worcester | District | 1990 |
| Woodland Street Firehouse | Worcester | Building | 1980 |
| Woodland Street Historic District | Worcester | District | 1980 |
| Woodlawn Cemetery | Clinton | Site | 2013 |
| Worcester Academy | Worcester | District | 1980 |
| Worcester Asylum and related buildings | Worcester | Building | 1980 |
| Worcester Bleach and Dye Works | Worcester | Building | 2000 |
| Worcester City Hall and Common | Worcester | Building | 1978 |
| Worcester Corset Company Factory | Worcester | Building | 1984 |
| Worcester County Courthouse | Worcester | Building | 2021 |
| Worcester Five Cents Savings Bank | Worcester | Building | 1978 |
| Worcester Market Building | Worcester | Building | 1980 |
| Worcester State Hospital Farmhouse | Worcester | Building | 2017 |
| Worcester Young Women's Christian Association | Worcester | Building | 2023 |
| YWCA of Worcester | Worcester | Building | 2022 |
| Zemaitis, Anthony, Three-Decker | Worcester | Building | 1990 |
First Church of Christ, Lancaster NHL Lancaster · Building · listed 1970 
Fruitlands NHL Harvard · District · listed 1974 
Goddard Rocket Launching Site NHL Auburn · Site · listed 1966 
Gough, John B., House NHL Boylston · Building · listed 1974 
Liberty Farm NHL Worcester · Building · listed 1974 
Putnam, Gen. Rufus, House NHL Rutland · Building · listed 1972 
American Antiquarian Society NHL Worcester · Building · listed 1968 
Abbott Street School Worcester · Building · listed 1980 
Academie Brochu Southbridge · Building · listed 1989 
Adams, Benjamin, House Uxbridge · Building · listed 1983