Ohio - Significance region: Local
| Waterville Commercial District |
| Watkins House |
| Watterson School |
| Watt-Groce-Fickhardt House |
| Waynesville Engine House and Lockup |
| Waynesville Greek Revival Houses |
| Waynesville Main Street Historic District |
| Webber, A. R., House |
| Webster Manufacturing |
| Webster School |
| Weddle, Callahill and Priscilla, House |
| Weethee Historic District |
| Weizer Building |
| Weizer Building |
| Wellington Historic District |
| Wells-Clark-Strouss House |
| Wells, Harvey, House |
| Welsbach Building |
| Welsh Presbyterian Church |
| Welton, Allen, House |
| Werner Company Building |
| Werner, Edward P., House |
| Werner Inn |
| Wesley Chapel |
| Wesley Chapel |
| Wesley Temple AME Church |
| West 25th Street-Detroit Avenue Historic District |
| West Alexandria Depot |
| Westbrock Funeral Home |
| West End Elementary School |
| Western Female Seminary |
| Western Reserve Building |
| Westervelt Hall |
| Westerville High School-Vine Street School |
| West Federal Street Young Men’s Christian Association |
| West Fourth Street Historic District |
| West Fourth Street Historic District (Amendment) |
| West High School |
| West House |
| Westlake Hotel |
| West Main Street District |
| West Market School |
| West Market Street Boulevard Historic District |
| Westminster Church |
| Westmont Building |
| Westmoreland Historic District |
| West Mound Street Historic District |
| Weston, John Henry, House |
| West School |
| West Side Market |
| West Technical High School |
| West Third Street Historic District |
| West Union School |
| West View |
| Westwood Town Center Historic District |
| Weustoff and Getz Company |
| Whallon, James, House |
| Wheatley, Phillis, Association |
| Wheeler, John, House |
| Wheeling and Lake Erie Railroad Depot |
| Wheeling and Lake Erie RR Minerva Station |
| Wheeling Avenue Historic District |
| Whitby Mansion |
| White Chewing Gum Company Building |
| Whitehall Farm |
| White, Henry P., House |
| White, Samuel M., House |
| Whitmer, Frieda, House |
| Whitmer, Soloman, House |
| Whitney, George W., House |
| WHK Studio One |
| Wichman's Grocery |
| Wick Avenue Historic District |
| Wick Building |
| Wickerham Inn |
| Wickersham House |
| Wick Park Historic District |
| Wilber, J. B., House |
| Wilcox, Jacob, Farm |
| Wilcox, James, House |
| Wilcox-Mills House |
| Wilder-Swaim House |
| Wiles, Perry, Grocery Company |
| Willdred Flats |
| Williams, Abner, Log House |
| Williams, Dr. Issac Elmer, House And Office |
| Williams, Elias, House |
| Williams, Henry Harrison, House |
| Williams House |
| Williams, Judge Henry, House |
| Williamson Mound Archeological District |
| Williams, W. L., House |
| William Tricker Inc. Historic District |
| Willow Lane Farm |
| Wilmington Commercial Historic District |
| Wilmot United Brethren Church |
| Wilson-Falkner-Baldauf House |
| Wilson, George D., House |
| Wilson-Gibson House |
| Wilson, John T., Homestead |
Data from United States Park Service and Wikidata
