Ohio - Criteria: C (architecture/engineering)
| Warren, Moses, House |
| Warren Public Library |
| Warsaw Hotel |
| Warszawa Neighborhood District |
| Washburn, Rev. Ebenezer, House |
| Washington Avenue Historic District |
| Washington Cemetery Historic District |
| Washington Heights School |
| Washington School |
| Washington Terrace Apartments |
| Washington Township School |
| Waterman Service Building |
| Watertown Historic District |
| Watkins House |
| Watt-Groce-Fickhardt House |
| Wayne County Courthouse District |
| Waynesville Engine House and Lockup |
| Waynesville Greek Revival Houses |
| Waynesville Main Street Historic District |
| Webster Manufacturing |
| Weddle, Callahill and Priscilla, House |
| Weizer Building |
| Weizer Building |
| Wells Building |
| Welsbach Building |
| Welsh Congregational Church |
| Welsh Presbyterian Church |
| Welton, Allen, House |
| Werner Company Building |
| Werner, Edward P., House |
| Werner Inn |
| Wesley Chapel |
| Wesley Chapel |
| West Alexandria Depot |
| West Baptist Church |
| Westcott House |
| West End Elementary School |
| Westerly Apartments |
| Western Female Seminary |
| Western Reserve Academy |
| Western Reserve Building |
| Westervelt Hall |
| Westerville High School-Vine Street School |
| West Fifth Street Bridge |
| West House |
| West Main Street District |
| West Main Street District |
| Westminster Church |
| Westmont Building |
| West Orange Road-Thomas Bridge |
| West Side Market |
| West Sister Island Light |
| West Technical High School |
| West Third Street Historic District |
| West Union School |
| West View |
| Westwood Town Center Historic District |
| Westwood United Methodist Church |
| Whallon, James, House |
| Wheatley, Phillis, Association |
| Wheeler, John, House |
| Wheeling and Lake Erie Railroad Depot |
| Whitby Mansion |
| White Bridge |
| Whitehall Farm |
| White, Henry P., House |
| Whiteman, Benjamin, House |
| White, Samuel M., House |
| White's-Vale Mill |
| White, Walter C., Estate |
| Whitewater Shaker Settlement |
| Whitmer, Frieda, House |
| Whitmer, Soloman, House |
| Whitney, George W., House |
| Wick Building |
| Wickerham Inn |
| Wickersham House |
| Wick Park Historic District |
| Wilcox, James, House |
| Wilcox-Mills House |
| Wilder-Swaim House |
| Wiles, Perry, Grocery Company |
| Willdred Flats |
| Williams, Abner, Log House |
| Williams County Courthouse |
| Williams, Dr. Issac Elmer, House And Office |
| Williams, Elias, House |
| Williams, Henry Harrison, House |
| Williams House |
| Williams, Judge Henry, House |
| Williams, W. L., House |
| Williard Hall |
| Willow Lane Farm |
| Wilmington Commercial Historic District |
| Wilmot United Brethren Church |
| Wilson-Falkner-Baldauf House |
| Wilson Feed Mill |
| Wilson, George D., House |
| Wilson-Gibson House |
| Wilson-Lenox House |
Data from United States Park Service and Wikidata
