Ohio - Criteria: A (event)
| Washington School |
| Washington Township School |
| Washington Township Voting Hall |
| Wayne County Courthouse District |
| Waynesville Engine House and Lockup |
| Waynesville Main Street Historic District |
| Webster Manufacturing |
| Weizer Building |
| Weizer Building |
| Wells Building |
| Welsh Congregational Church |
| Welton, Allen, House |
| Werner Company Building |
| Werner Inn |
| Wesley Chapel |
| Wesley Temple AME Church |
| West Baptist Church |
| Westbrock Funeral Home |
| Westerly Apartments |
| Western Female Seminary |
| Western Reserve Academy |
| Western Reserve Building |
| Westervelt Hall |
| Westerville High School-Vine Street School |
| Westlake Hotel |
| West Main Street District |
| West Market School |
| Weston, John Henry, House |
| West School |
| West Side Market |
| West Sister Island Light |
| West Technical High School |
| West Union School |
| Wheatley, Phillis, Association |
| Wheeling and Lake Erie Railroad Depot |
| Wheeling and Lake Erie RR Minerva Station |
| White Bridge |
| White Chewing Gum Company Building |
| White's-Vale Mill |
| Whitewater Shaker Settlement |
| Whitmer, Frieda, House |
| Whitney, George W., House |
| Whitney, Newel K., Store |
| Wichman's Grocery |
| Wick Building |
| Wick Park Historic District |
| Wiles, Perry, Grocery Company |
| Williams, Dr. Issac Elmer, House And Office |
| Williams, Henry Harrison, House |
| Wilmington Commercial Historic District |
| Wilson Feed Mill |
| Wilson, Samuel and Sally, House |
| Winders Motor Sales Company |
| Windsor Mills Christ Church Episcopal |
| Windsor Public School |
| Wintzer, Charles, Building |
| Withrow High School |
| Wittenberg University Historic District |
| Wolcott, Benajah, House |
| Wood County Home and Infirmary |
| Woodland Avenue and West Side Railroad Powerhouse |
| Woodland Cemetery |
| Woodland-Larchmere Commercial Historic District |
| Woodlawn Farm |
| Wood Old Homestead |
| Woodward Opera House |
| Worthington Manufacturing Company Boardinghouse |
| W.P. SNYDER, JR. (steamboat) |
| Wright Cycle Company-Wright and Wright Printing Offices |
| Wright, Daniel Thew, House |
| Wright Flyer III |
| Wyandot Mission Church |
| Xenia Carnegie Library |
| Y Bridge |
| Yellow Springs Historic District |
| YMCA |
| York United Methodist Church |
| Yost Tavern |
| Young, Thomas F., House |
| Young Women's Christian Association of Cincinnati |
| YWCA Building |
| Zanesville YWCA |
| Zero Gravity Research Facility (B-2) |
| Zettler Grocery and Hardware |
| Zimmerly House |
| Zimmerman, Ezekiel B., Octagon House |
| Zion Lutheran Church |
| Zion Lutheran Church |
| Zollinger, S., Company Building |
Data from United States Park Service and Wikidata
