Ohio - Significance region: Local
| University Hall, Cleveland State University |
| University Hall-Gray's Chapel |
| Unzicker-Cook House |
| Upland Farm |
| Upper Arlington Historic District |
| Upper Downtown Canton Historic District |
| Upson House |
| Upson-Walton Company Building |
| Uptown Toledo Historic District |
| Uptown Westerville Historic District |
| Urbana College Historic Buildings |
| Urbana Country Club |
| Urbana Monument Square Historic District |
| Ursuline Center |
| U.S. Coast Guard Building |
| U.S. Grant Birthplace and Grant Commemorative Sites Historic District |
| 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 |
| Valley Railway Historic District |
| Van Deman, Henry, House |
| Van Horn Building |
| Vanmeter Church Street House |
| Van Rooy Coffee Company Building |
| Van Wert Bandstand |
| Variety Store Building and Theatre |
| Vaughan, John, House |
| Vaughn, Daniel, Homestead |
| Vaughn, Richard, Farm |
| Vaughn Site (33CU65) |
| Vaugh-Stacy-Evans Farm Historic District |
| Venice Building |
| Vermilion Institute |
| Vermilion Town Hall |
| Verona Apartments |
| Versailles Town Hall and Wayne Township House |
| Viall Lodge |
| Vicary House |
| Victory Theater Building |
| Village Historic District |
| Village of Addyston Historic District |
| Villa San Bernardo Historic District |
| Vistula Historic District |
| Voegele Building |
| Von Schulenburg, Ernst, House |
| Voris, Peter Jr., House |
| Wade Memorial Chapel |
| Wadsworth, Benjamin, House |
| Wadsworth Downtown Historic District |
| Wadsworth, Frederick, House |
| Wadsworth, James, House |
| Waernicke-Hille House And Store |
| Wagner Brothers Bottling Works |
| 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 |
| Wallace Farm |
| Walling, Ansel T., House |
| Walnut Street School |
| Walper, Capt. Henry, House |
| Walters, Dr. Jefferson A., House |
| Walters, Vincent, House-Walters Music Academy |
| Wamsley Village Site |
| Wapakoneta Commercial Historic District |
| Ward House |
| Ward-Thomas House |
| Ward, W. S., House |
| Ware, Edwin L., House |
| Waring House |
| Warner & Swasey Company Building |
| Warner Theater |
| War Of 1812 Battle Site |
| Warren Commercial Historic District |
| Warren, Moses, House |
| Warren Public Library |
| Warren Tavern Complex |
| Warsaw Avenue Historic District |
| Warsaw Hotel |
| Warszawa Neighborhood District |
| Warwick Interlocking Tower |
| Washburn, Rev. Ebenezer, House |
| Washington Avenue Historic District |
| Washington Cemetery Historic District |
| Washington Court House Commercial Historic District |
| Washington Heights School |
| Washington School |
| Washington Terrace Apartments |
| Washington Township School |
| Washington Township Voting Hall |
| Waterman Service Building |
| Waterstreet Historic District |
| Watertown Historic District |
Data from United States Park Service and Wikidata
