| Adams, Demas, House | Worthington | Building | 1980 |
| Agler-La Follette House | Columbus | Building | 1978 |
| Alkire House | Westerville | Building | 1978 |
| American Insurance Union Citadel (Palace Theatre Amendment) | Columbus | Building | 1975 |
| Arendt-Seymour House | Canal Winchester | Building | 1989 |
| Artz House | Dublin | Building | 1979 |
| Athletic Club of Columbus | Columbus | Building | 2011 |
| Bank Block Building | Grandview | Building | 1997 |
| Barnhardt-Bolenbaugh House | Canal Winchester | Building | 1989 |
| Beatty-Moore House | Columbus | Building | 2023 |
| Beery, Dr. L. W., House | Canal Winchester | Building | 1989 |
| Bellows Avenue School | Columbus | Building | 2024 |
| Bergstresser Covered Bridge | Canal Winchester | Structure | 1974 |
| Berry Brothers Bolt Works | Columbus | Building | 1988 |
| Berry, Richard Jr., House | Columbus | Building | 2005 |
| Boles, E., Cottage | Dublin | Building | 1979 |
| Born Capital Brewery Bottling Works | Columbus | Building | 2009 |
| Bradford Shoe Company Building | Columbus | Building | 1994 |
| Brand, Asher, Residence | Dublin | Building | 1979 |
| Brelsford-Seese House | Dublin | Building | 1979 |
| Broad Street Apartments | Columbus | Building | 1986 |
| Broad Street Christian Church | Columbus | Building | 1986 |
| Broad Street United Methodist Church | Columbus | Building | 1980 |
| Bruns-Wynkoop House | Canal Winchester | Building | 1989 |
| Buckeye State Building and Loan Company Building | Columbus | Building | 2004 |
| Budd Dairy Company | Columbus | Building | 2017 |
| Butler, J.G., House | Dublin | Building | 1979 |
| Buttles-Johnson House | Worthington | Building | 1973 |
| Buttles, Aurora, House | Worthington | Building | 1980 |
| Cambridge Arms | Columbus | Building | 2003 |
| Camp Chase Site | Columbus | Site | 1973 |
| Campbell Mound | Columbus | Structure | 1970 |
| Canal Winchester Methodist Church | Canal Winchester | Building | 1982 |
| Canal Winchester School | Canal Winchester | Building | 2007 |
| Cannon, Tom, Mound | Georgesville | Structure | 1974 |
| Capital University Historic District | Columbus | District | 1982 |
| Capital University Historic District (Boundary Increase) | Bexley | District | 2013 |
| Carnegie Library Otterbein University | Westerville | Building | 2021 |
| Carty, J.-R. J. Tussing House | Canal Winchester | Building | 1989 |
| Central Assurance Company | Columbus | Building | 1986 |
| Central Building of the Columbus Young Men's Christian Association | Columbus | Building | 1993 |
| Central College Presbyterian Church | Westerville | Building | 1980 |
| Central High School | Columbus | Building | 1985 |
| Central Ohio Lunatic Asylum | Columbus | Building | 1986 |
| Chaney, O. P., Grain Elevator | Canal Winchester | Structure | 1988 |
| Chapman-Hutchinson House | Dublin | Building | 1979 |
| Coe Mound | Columbus | Structure | 1974 |
| Coe, Truman and Sylvia Bull, House | Columbus | Building | 2006 |
| Coffman, Fletcher, House | Dublin | Building | 1979 |
| Columbia Building | Columbus | Building | 1983 |
| Columbus Carriage Manufacturing Co. - Seagrave Co. Buildings | Columbus | Building | 2024 |
| Columbus Center | Columbus | Building | 2023 |
| Columbus Country Club Mound | Columbus | Structure | 1974 |
| Columbus Gallery of Fine Arts | Columbus | Building | 1992 |
| Columbus Near East Side District | Columbus | District | 1978 |
| Columbus Near East Side Historic District-Parsons Avenue (Boundary Increase) | Columbus | District | 1983 |
| Columbus Savings and Trust Building | Columbus | Building | 1977 |
| Columbus Street Historic District | Canal Winchester | District | 1988 |
| Columbus Transfer Company Warehouse | Columbus | Building | 1983 |
| Columbus, Hocking Valley and Toledo Railway Depot | Canal Winchester | Building | 1988 |
| Datz, Walter, House | Dublin | Building | 1979 |
| David's Reformed Church | Canal Winchester | Building | 1989 |
| Davis, Alexander, Cabin | Dublin | Building | 1979 |
| Davis, Alexander, House | Dublin | Building | 1979 |
| Davis, Anson, House | Dublin | Building | 1975 |
| Davis, Anson, Springhouse | Dublin | Building | 1979 |
| Davis, James, Barn | Dublin | Building | 1979 |
| Davis, James, Farm | Dublin | Building | 1979 |
| Davis, Samuel Henry, House | Dublin | Building | 1979 |
| Davis, Samuel, House | Columbus | Building | 1974 |
| Decker, Elias, Farmhouse | Canal Winchester | Building | 1989 |
| Deitz, Samuel, Farmhouse | Canal Winchester | Building | 1989 |
| Del Monte Apartments | Columbus | Building | 2016 |
| Drake, Elam, House | Columbus | Building | 1978 |
| Drexel Theater | Bexley | Building | 2015 |
| Dublin Cemetery Vaults | Dublin | Building | 1979 |
| Dublin Christian Church | Dublin | Building | 1979 |
| Dublin Christian Church | Dublin | Building | 1979 |
| Dublin High Street Historic District | Dublin | District | 1979 |
| Dublin Veterinary Clinic | Dublin | Building | 1979 |
| Dun, John, Homestead | Dublin | Building | 1979 |
| Duncan, Robert P., House | Bexley | Building | 1984 |
| Ealy, George and Christina, House | New Albany | Building | 2008 |
| East Broad Street Commercial Building | Columbus | Building | 1986 |
| East Broad Street Historic District | Columbus | District | 1987 |
| East Broad Street Presbyterian Church | Columbus | Building | 1987 |
| East North Broadway Historic District | Columbus | District | 2010 |
| East Town Street Historic District | Columbus | District | 1976 |
| Eastgate Apartments Historic District | Columbus | District | 2023 |
| Edna, The | Columbus | Building | 2017 |
| Engine House No. 16 | Columbus | Building | 1995 |
| Engine House No. 6 | Columbus | Building | 2016 |
| Epley, Henry J., House | Canal Winchester | Building | 1989 |
| Evans, Richard W., House | Worthington | Building | 1980 |
| Everal, John W., Farm Buildings | Westerville | Building | 1975 |
| Felton School | Columbus | Building | 1984 |
| Fifth Avenue and North High Historic District | Columbus | District | 1990 |
| First Congregational Church | Columbus | Building | 2021 |
| Foor-Alspach House | Canal Winchester | Building | 1989 |
| Ford Motor Company Columbus Branch Assembly Plant | Columbus | Building | 2021 |
| Fort Hayes | Columbus | District | 1970 |
| Franklin Park Conservatory | Columbus | Building | 1974 |
| Franklin Park Medical Center | Columbus | Building | |
| Franklinton Apartments at Broad and Hawkes | Columbus | Building | 2005 |
| Franklinton Apartments at State and May | Columbus | Building | 2005 |
| Franklinton Post Office | Columbus | Building | 1973 |
| Frantz House | Dublin | Building | 1979 |
| Gaetz Music House | Columbus | Building | 2014 |
| Galbreath, John, Mound | Galloway | Structure | 1974 |
| Gantz Homestead | Grove City | Building | 1979 |
| Gardner House | Worthington | Building | 1980 |
| Garfield-Broad Apartments | Columbus | Building | 1986 |
| Gayman, Christian, House | Canal Winchester | Building | 1989 |
| Gelpi, Eleanor A., House | Dublin | Building | 2001 |
| German Village | Columbus | District | 1974 |
| German Village (Boundary Increase) | Columbus | District | 1980 |
| Gilbert House | Worthington | Building | 1980 |
| Gilbert-Wilcox House | Worthington | Building | 1980 |
| Glen Echo Historic District | Columbus | District | 1997 |
| Godman, H.C., Co. Building | Columbus | Building | 2018 |
| Graham, A.B., House | Columbus | Building | 2015 |
| Grant, A. G., Homestead | Grove City | Building | 1998 |
| Great Southern Hotel and Theatre | Columbus | Building | 1982 |
| Green Lawn Abbey | Columbia | Building | 2007 |
| Green Lawn Cemetery | Columbus | District | 2024 |
| Grieve, Martin and Louise, House | Dublin | Building | 2024 |
| Griffith, James, House | Canal Winchester | Building | 1989 |
| Griswold Memorial Young Women's Christian Association | Columbus | Building | 1993 |
| Groveport Log Houses | Groveport | Building | 1976 |
| Groveport School | Groveport | Building | 2009 |
| Groveport Town Hall Historic Group | Groveport | Building | 1978 |
| Groveport United Methodist Church | Groveport | Building | 1995 |
| Haffey, Parley, Farm Complex | Canal Winchester | Building | 1989 |
| Hamilton Park Historic District | Franklin | District | 1983 |
| Hamilton, Gilbert H., House | Columbus | Building | 1992 |
| Hamilton, J. L., Residence | Amlin | Building | 1979 |
| Hamlet, The | Columbus | Building | 2015 |
| Hanby, Benjamin, House | Westerville | Building | 1970 |
| Hanford Village George Washington Carver Addition Historic District | Columbus | District | 2013 |
| Hanna House | Columbus | Building | 1979 |
| Harrison, Gen. William Henry, Headquarters | Columbus | Building | 1972 |
| Hart, Gideon, House | Westerville | Building | 1973 |
| Hart, Lucy, House | Worthington | Building | 1980 |
| Hartley Mound | Columbus | Structure | 1974 |
| Hartman Hotel | Columbus | Building | 2018 |
| Hayden Building | Columbus | Building | 2009 |
| Helpman-Chaney House | Canal Winchester | Building | 1989 |
| Herr, Christian S., House | Lockbourne | Building | 1982 |
| Heyne-Zimmerman House | Columbus | Building | 1987 |
| Higgins, H. A., Building | Columbus | Building | 1979 |
| High and Gay Streets Historic District | Columbus | District | 2014 |
| Hilliard Methodist Episcopal Church | Hilliard | Building | 1988 |
| Holder-Wright Works | Dublin | Structure | 1974 |
| Holy Cross Church, Rectory and School | Columbus | Building | 1979 |
| Holy Rosary Roman Catholic Church Complex | Columbus | Building | 2024 |
| Home for the Aged Deaf | Westerville | Building | 1980 |
| Hotel Central | Worthington | Building | 1980 |
| House at 753 East Broad Street | Columbus | Building | 1986 |
| Huntington, Franz, House | Bexley | Building | 1980 |
| Indian Run Cemetery Stone Walls | Dublin | Structure | 1979 |
| Indianola Junior High School | Columbus | Building | 1980 |
| Iuka Ravine Historic District | Columbus | District | 1986 |
| Jackson Fort | Columbus | Site | 1974 |
| Jacobs, Felix A., House | Columbus | Building | 1986 |
| Jaeger Machine Company Office Building | Columbus | Building | 1983 |
| Jeffers, H. P., Mound | Worthington | Structure | 1974 |
| Jefferson Avenue Historic District | Columbus | District | 1982 |
| Jeffrey Manufacturing Company Office Building | Columbus | Building | 2001 |
| Jeffrey, Malcolm, House | Bexley | Building | 1983 |
| Johnson-Campbell House | Columbus | Building | 1986 |
| Jones, W. H., Mansion | Columbus | Building | 1978 |
| Joseph-Cherrington House | Columbus | Building | 1986 |
| Julian and Kokenge Company | Columbus | Building | 2013 |
| Kahiki, The | Columbus | Building | 1997 |
| Karrer Barn | Dublin | Building | 1979 |
| Karrer, Henry, House | Dublin | Building | 1979 |
| Kauffman, Linus B., House | Columbus | Building | 1986 |
| Kaufman, Frank J., House | Columbus | Building | 1986 |
| Kilbourn Commercial Building | Worthington | Building | 1980 |
| Kilbourn, William, House | Dublin | Building | 1979 |
| Kilgour, Frederick G., House | Upper Arlington | Building | 2012 |
| King, William, House | Canal Winchester | Building | 1989 |
| Knights of Columbus Building | Columbus | Building | 2020 |
| Krumm House | Columbus | Building | 1982 |
| L. Hoster Brewing Company | Columbus | District | 2019 |
| Landes, Samuel, House | Lockbourne | Building | 1987 |
| Lanman-Ingram House | Marble Cliff | Building | 2021 |
| Lehman, Abraham, Farmhouse | Canal Winchester | Building | 1989 |
| Leppert, C., Barn | Dublin | Building | 1979 |
| Leppert, C., Cabin | Dublin | Building | 1979 |
| Leppert, C., Farm | Dublin | Building | 1979 |
| Levy, Soloman, House | Columbus | Building | 1986 |
| Lincoln Theatre | Columbus | Building | 1992 |
| Livingston, Alexander W., House | Reynoldsburg | Building | 1994 |
| Long and Third Commercial Building | Columbus | Building | 1982 |
| Longenecker, Doctor, Office Building | Worthington | Building | 1990 |
| Lovejoy, Carrie, House | Columbus | Building | 1986 |
| Lubal Manufacturing and Distributing Company, The | Columbus | Building | 2016 |
| Market-Mohawk Center | Columbus | Building | 2020 |
| Market-Mohawk Historic District | Columbus | District | 2025 |
| Marshall, David, House | Dublin | Building | 1979 |
| Masonic Temple | Columbus | Building | 1997 |
| Mattoon-Woodrow House | Worthington | Building | 1980 |
| McClure-Nesbitt Motor Company | Columbus | Building | 2024 |
| McCracken-Sells House | Columbus | Building | 1984 |
| McDannald Homestead | Columbus | Building | 1978 |
| McDowell, Austin, House | Dublin | Building | 1979 |
| McKitrick, Dr., House | Dublin | Building | 1979 |
| McKitrick, Dr., Office | Dublin | Building | 1979 |
| Merryman, Dr. James, House | Hilliard | Building | 1988 |
| Methodist Church Parsonage | Canal Winchester | Building | 1989 |
| Miller, Frederick A., House-Broad Gables | Columbus | Building | 1985 |
| Miller, J.F., House | Marble Cliff | Building | 1984 |
| Mitchell, Charles, House | Washington Township | Building | 1979 |
| Morris, C. E., House | Columbus | Building | 1986 |
| Mt. Vernon Avenue Historic District | Columbus | District | 2025 |
| Municipal Light Plant | Columbus | Building | 2015 |
| Myer House | Sandy Corners | Building | 1979 |
| Nafzger-Miller House | Gahanna | Building | 1999 |
| Near Northside Historic District | Columbus | District | 1980 |
| New England Lodge | Worthington | Building | 1973 |
| New Hayden Building | Columbus | Building | 2009 |
| New Indianola Historic District | Columbus | District | 1985 |
| Niles Car & Manufacturing Company Electric Railway Interurban Combine No. 21 | Worthington | Structure | 1987 |
| Noble, Jonathan, House | Columbus | Building | 1975 |
| Noble, Lewis, House | Worthington | Building | 1980 |
| North Columbus Commercial Historic District | Columbus | District | 2010 |
| North High School | Columbus | Building | 1987 |
| North High Street Historic District | Canal Winchester | District | 1989 |
| North Market Historic District | Columbus | District | 1982 |
| Odd Fellows Hall | Hilliard | Building | 1988 |
| Ohio Asylum for the Blind | Columbus | Building | 1973 |
| Ohio Baptist General Association Headquarters | Columbus | Building | 2020 |
| Ohio Bell Southwestern Headquarters | Columbus | Building | 2021 |
| Ohio Farm Bureau Federation Offices | Columbus | Building | 1987 |
| Ohio Finance Building | Columbus | Building | 2014 |
| Ohio Historical Center and Ohio Village | Columbus | District | 2023 |
| Ohio Institution for the Education of the Deaf and Dumb | Columbus | Building | 1984 |
| Ohio Moline Plow Company Building | Columbus | Building | 1999 |
| Ohio National Bank | Columbus | Building | 1980 |
| Ohio Stadium | Columbus | Building | 1974 |
| Ohio State Arsenal | Columbus | Building | 1974 |
| Ohio State Office Building | Columbus | Building | 1990 |
| Ohio State Office Building (Boundary Increase) | Columbus | Building | 2022 |
| Ohio Statehouse NHL | Columbus | Building | 1972 |
| Ohio Theatre NHL | Columbus | Building | 1973 |
| Old Beechwold Historic District | Columbus | District | 1987 |
| Old Governor's Mansion | Columbus | Building | 1972 |
| Old North End Historic District | Columbus | District | 1996 |
| Old North End Historic District (Boundary Increase) | Columbus | District | 1999 |
| Old Ohio Union | Columbus | Building | 1979 |
| Old Peace Lutheran Church | Gahanna | Building | 1987 |
| Old Port Columbus Airport Control Tower | Columbus | Building | 1979 |
| Open Air School | Columbus | Building | 2019 |
| Orton Memorial Laboratory | Columbus | Building | 1983 |
| Osborn, Charles S., House | Westerville | Building | 1977 |
| Otterbein Mausoleum | Westerville | Building | 1979 |
| Park, Jonathan, House | Worthington | Building | 1980 |
| Peoples Bank Company Building | Canal Winchester | Building | 1989 |
| Pierce, Elijah, Properties | Columbus | Building | 1983 |
| Pinney Road Log Cabin | Dublin | Building | 1979 |
| Pinney, Dr. Eli, House | Dublin | Building | 1979 |
| Plaza Hotel | Columbus | Building | 1984 |
| Prentiss-Tulford House | Columbus | Building | 1986 |
| Prentiss, Frederick, House | Columbus | Building | 1986 |
| Presbyterian Parsonage | Westerville | Building | 1980 |
| Principal's Cottage | Worthington | Building | 1980 |
| Pythian Temple and James Pythian Theater | Columbus | Building | 1983 |
| Rager, John, Farmhouse | Canal Winchester | Building | 1990 |
| Railroad Employes Building & Loan Company | Columbus | Building | 2026 |
| Rankin Building | Columbus | Building | 1982 |
| Rickenbacker, Capt. Edward V., House NHL | Columbus | Building | 1976 |
| Riley, F., House | Dublin | Building | 1979 |
| Rings, Louis, Barn #1 | Dublin | Building | 1979 |
| Rings, Louis, Barn #2 | Amlin | Building | 1979 |
| Rings, Louis, Residence | Dublin | Building | 1979 |
| Ripley House | Worthington | Building | 1980 |
| Rush Creek Village Historic District | Worthington | District | 2003 |
| Russell, Mark, House | Riverlea | Building | 1976 |
| Saint Paul's Episcopal Church | Columbus | Building | 1986 |
| Schlee Brewery Historic District | Columbus | District | 1988 |
| Schlee-Kemmler Building | Columbus | Building | 1982 |
| Schueller, Erwin W., House | Columbus | Building | 1986 |
| Scofield-Sanor House | Columbus | Building | 1986 |
| Second Presbyterian Church | Columbus | Building | 1983 |
| Sells, Benjamin, Barn #1 | Dublin | Building | 1979 |
| Sells, Benjamin, Barn #2 | Dublin | Building | 1979 |
| Sells, Benjamin, House | Dublin | Building | 1975 |
| Sells, Benjamin, Wash House | Dublin | Building | 1979 |
| Sells, David, Barn | Dublin | Building | 1979 |
| Sells, Eliud, House | Dublin | Building | 1979 |
| Sells, William Henry, House | Dublin | Building | 1979 |
| Seneca Hotel | Columbus | Building | 1983 |
| Sessions Village | Columbus | District | 1975 |
| Sharon Township Town Hall | Worthington | Building | 1980 |
| Sharp-Page House | Columbus | Building | 1986 |
| Shedd-Dunn House | Columbus | Building | 1986 |
| Shepard Street School | Gahanna | Building | 1979 |
| Shier, Carl H., Barn | Amlin | Building | 1979 |
| Shier, Carl H., Chicken House | Amlin | Building | 1979 |
| Shier, Carl H., House | Amlin | Building | 1979 |
| Shiloh Baptist Church | Columbus | Building | 2004 |
| Short North Historic District | Columbus | District | 1990 |
| Skeele, Capt. J. S., House | Worthington | Building | 1980 |
| Smith, Benjamin, House | Columbus | Building | 1973 |
| Snow, John, House | Worthington | Building | 1973 |
| South High Street Commercial Grouping | Columbus | District | 1983 |
| Squire's Glen Farm | Central College | Building | 1974 |
| St. Clair Hospital | Columbus | Building | 2001 |
| St. John's Episcopal Church | Worthington | Building | 1980 |
| St. John's Lutheran Church | Sandy Corners | Building | 1979 |
| Standard Building, The | Columbus | Building | 2019 |
| Stevenson, Joshua, House | Canal Winchester | Building | 2007 |
| Stoddart Block | Columbus | Building | 1994 |
| Sullivant, Lucas, Building | Columbus | Building | 1973 |
| Teakwood Heights Historic District | Columbus | District | 2024 |
| Temperance Row Historic District | Westerville | District | 2008 |
| Theresa Building | Columbus | Building | 2015 |
| Third Avenue and North High Historic District | Columbus | District | 1990 |
| Thompson-Builder House | Dublin P.O. | Building | 1979 |
| Thrush, Morgan, Farm Complex | Canal Winchester | Building | 1989 |
| Thurber, James, House | Columbus | Building | 1979 |
| Times Building-Lodge Hall | Canal Winchester | Building | 1989 |
| Toledo and Ohio Central Railroad Station | Columbus | Building | 1973 |
| Tosheff's Restaurant and Hotel | Columbus | Building | 2001 |
| Towers Hall, Otterbein College | Westerville | Building | 1971 |
| Trinity Episcopal Church | Columbus | Building | 1976 |
| Trinity German Evangelical Lutheran Church | Columbus | Building | 1985 |
| U.S. Post Office and Courthouse | Columbus | Building | 1973 |
| United States Carriage Company | Columbus | Building | 2015 |
| United States Post Office and Courthouse | Columbus | Building | 2012 |
| University, Hayes and Orton Halls | Columbus | Building | 1970 |
| Upper Arlington Historic District | Upper Arlington | District | 1985 |
| Uptown Westerville Historic District | Westerville | District | 2019 |
| Valley Dale Ballroom | Columbus | Building | 1982 |
| Walters, Vincent, House-Walters Music Academy | Columbus | Building | 2023 |
| Washburn, Rev. Ebenezer, House | Westerville | Building | 1980 |
| Washington Township School | Dublin | Building | 1979 |
| Washington Township Voting Hall | Amlin | Building | 1979 |
| Welsbach Building | Columbus | Building | 1984 |
| Welsh Presbyterian Church | Columbus | Building | 1980 |
| Wesley Chapel | Hilliard | Building | 1979 |
| West High School | Columbus | Building | 2022 |
| West Mound Street Historic District | Canal Winchester | District | 1988 |
| Westerville High School-Vine Street School | Westerville | Building | 1975 |
| Westminster Church | Columbus | Building | 2001 |
| Whitmer, Frieda, House | Amlin | Building | 1979 |
| Wilcox, Jacob, Farm | Amlin | Building | 1979 |
| Wilcox, James, House | Amlin | Building | 1979 |
| Winders Motor Sales Company | Columbus | Building | 2019 |
| Winterringer Building and House | Hilliard | Building | 1988 |
| Worthington Historic District | Worthington | District | 2010 |
| Worthington Historical Society Museum | Worthington | Building | 1980 |
| Worthington Manufacturing Company Boardinghouse | Worthington | Building | 1973 |
| Worthington Public Square | Worthington | Site | 1980 |
| Worthington United Presbyterian Church | Worthington | Building | 1980 |
| Wright, Horace, House | Worthington | Building | 1980 |
| Wright, J.E. Farm | Dublin | Building | 1979 |
| Wright, Potter, House | Worthington | Building | 1980 |
| Wyandotte Building | Columbus | Building | 1972 |
| York Lodge No. 563 | Columbus | Building | 1984 |
| Yuster Building | Columbus | Building | 2017 |
| Zellers-Langel House | Canal Winchester | Building | 1989 |
| Zettler Grocery and Hardware | Columbus | Building | 2014 |
| Zion's Evangelical Lutheran Church | Obetz | Building | 2004 |