{"nrhp_refnum":"78003115","name":"Mahoning Avenue Historic District (Boundary Increase)","other_names":["See Also:Mahoning Avenue Historic District"],"category":"district","location":{"address":"Mahoning Ave. between Perkins Dr. and High St.","address_restricted":false,"city":"Warren","county":"Trumbull County","state":"OH","lat":41.23817315900004,"lon":-80.82052189099994,"geom_source":"nps_gis"},"listed_date":"1978-05-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Law","Politics/Government","Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"A block-long residential street district on Mahoning Avenue NW in Warren, Trumbull County, Ohio, with one church and several 19th-century houses; this nomination extends the district to the east side of the street.","why_significant":"The district was the center of Warren's social life and the site of nationally important political activity in the 19th century. It also shows a wide range of styles, from Federal and Greek Revival to Italianate and Queen Anne. The eastern structures were left out of the 1971 listing, which did not recognize their significance or their contribution to the district's visual cohesiveness.","narrative":"Mahoning Avenue in Warren, Ohio, is a short residential street whose houses and one church record a century of architecture and political life. The boundary increase adds the structures on the eastern side of the street to the western half listed in 1971. The buildings range from Federal and Greek Revival to Victorian Italianate, Queen Anne and Romanesque Revival. The Smith House was built in 1828 by Isaac Ladd for Leicester King, and the Kinsman House followed in 1832. Henry B. Perkins's house drew Grant, Garfield, Hayes, Harrison and McKinley. The Harriet Taylor Upton House later served as national suffrage headquarters. The Adams House dates from the 1840s, and the First Presbyterian Church building was dedicated in 1876. The district was the center of Warren's social life and the setting for nationally important political activity. Demolitions and commercial growth threaten both ends of the street.","period_of_significance":"1800-1899","architect_builder":"Isaac Ladd (master builder of the Smith House); Henry B. Perkins (designed as his own residence, per the form)","architectural_style":"Federal, Greek Revival, Victorian Italianate, Queen Anne, Romanesque Revival","criteria":[],"status_note":"Condition marked good and altered. Uses include private residences, apartments, county offices (Kinsman House) and Warren City Hall (Perkins House). Two structures show signs of neglect, and demolitions and commercial growth threaten both ends of the district.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:10.072906-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/78003115.pdf"},"photo":null,"district":{"nrhp_refnum":"83002063","name":"Warren Commercial Historic District","url":"https://nationalhistoricalregister.com/districts/ohio/warren-commercial-historic-district-83002063/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71991697","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/trumbull-county/mahoning-avenue-historic-district-boundary-increase-78003115/"}