Ohio - Criteria: C (architecture/engineering)
| Twinsburg Congregational Church |
| Twinsburg Institute |
| Tytus, John B., House |
| Ulyatt, Abraham, House |
| Umsted Farm |
| Unger, George B., House |
| Union Block |
| Union Cemetery-Beatty Park |
| Union Church |
| Union Club |
| Union Terminal Group |
| Union Trust Building |
| Unionville District School |
| Unionville Tavern |
| United Brethren in Christ |
| United Brethren Publishing House |
| United Church of Huntington |
| United Methodist Church |
| United Methodist Church |
| United Methodist Church |
| United Motor Service Building |
| United States Courthouse and Custom House |
| United States Playing Card Company Complex |
| United States Post Office and Courthouse |
| United States Post Office and Court House |
| Universalist Church Historic District |
| Universalist Church Of Westfield Center |
| University Hall-Gray's Chapel |
| University, Hayes and Orton Halls |
| Unzicker-Cook House |
| Upham-Wright House |
| Upland Farm |
| Upper Arlington Historic District |
| Upper Downtown Canton Historic District |
| Upson House |
| Upson-Walton Company Building |
| Urbana Monument Square Historic District |
| Ursuline Center |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office and Courthouse |
| US Post Office and Federal Building-Zanesville |
| Valentine Theater Building |
| Van Deman, Henry, House |
| Van Horn Building |
| Vanmeter Church Street House |
| Vanmeter Stone House and Outbuildings |
| Van Wert Bandstand |
| Van Wert County Courthouse |
| Variety Store Building and Theatre |
| Vaughan, John, House |
| Vaughn, Daniel, Homestead |
| Vaughn, Richard, Farm |
| Vermilion Institute |
| Vermilion Town Hall |
| Verona Apartments |
| Versailles Town Hall and Wayne Township House |
| Viall Lodge |
| Vicary House |
| Village Historic District |
| Village Hobby Shop |
| Village of Addyston Historic District |
| Village of Mariemont |
| Vistula Historic District |
| Vitrolite Building |
| Voegele Building |
| Von Schulenburg, Ernst, House |
| Voris, Peter Jr., House |
| Wade Memorial Chapel |
| Wade Park District |
| Wadsworth, Benjamin, House |
| Wadsworth, Frederick, House |
| Wadsworth, James, House |
| Waernicke-Hille House And Store |
| Wagner Palace |
| Waldschmidt-Camp Dennison District |
| Walke, Anthony, and Susan Cardinal, House |
| Walker and Weeks Office Building |
| Walker, Cristopher C., House and Farm |
| Wallace, Charlton, House |
| Walling, Ansel T., House |
| Wallischeck Homestead |
| Walnut Hills United Presbyterian Church |
| Walnut Street School |
| Walper, Capt. Henry, House |
| Walters, Dr. Jefferson A., House |
| Warder, John Aston, House |
| Warder Public Library |
| Ward House |
| Ward, John Q. A., House |
| Ward-Thomas House |
| Ward, W. S., House |
| Ware, Edwin L., House |
| Waring House |
| Warner Theater |
| Warnke Covered Bridge |
Data from United States Park Service and Wikidata
