Wisconsin - Area of significance: Architecture
| Union High School |
| Union House Hotel |
| Union National Bank |
| United Laymen Bible Student Tabernacle |
| United States Post Office and Court House |
| United States Post Office and Federal Courthouse |
| United Unitarian and Universalist Church |
| Unity Chapel |
| University Heights Historic District |
| University Hill Farms Historic District |
| University of Wisconsin Arboretum |
| University of Wisconsin Field House |
| University of Wisconsin Memorial Union |
| University Presbyterian Church and Student Center |
| Upham House Historic District |
| Upper Main Street Historic District |
| Uptown Theater |
| US Post Office and Courthouse |
| US Post Office, Former |
| US Post Office-Menasha |
| US Post Office-Racine Main |
| Van Altena, William, House |
| Van Brunt, Daniel C., House |
| Van Buren, Sarah Belle, House |
| Van Devan, G. B., House |
| Vangindertahlen, Louis, House |
| Van Orden, Jacob, House |
| Van Ostrand, Dewitt Clinton, House |
| Vaughn's Hall and Blacksmith Shop |
| Vernon County Courthouse |
| Vernon County Normal School |
| Vertefeuille, Francois, House |
| Veterans Cottages Historic District |
| Veterans Home Chapel |
| Vilas, Joseph, Jr., House |
| Villa Laun |
| Villa Louis |
| Villa Von Baumbach |
| Vincent, James, House |
| Vining, Gorham, P., House |
| Viroqua Downtown Historic District |
| Visitation Convent Complex |
| Vocke, Frank, Octagonal Barn |
| Voigt, Jacob, House |
| Voss' Birchwood Lodge |
| Wade, Sylvanus, House |
| Wadhams Gas Station |
| Wahle-Laird House |
| Wakefield Hall |
| Walker, Harry B., House |
| Walker's Point Historic District |
| Wallace-Jagdfeld Octagon House |
| Wall, Thomas R., Residence |
| Walser, Ulrich, House |
| Walter-Heins House |
| Walter, Luther and Anna, Boathouse |
| Ward District No. 3 Schoolhouse |
| Ward Memorial Hall |
| Warner, Anson, Farmstead |
| Warren, Stephen, House |
| Washburn Observatory and Observatory Director's Residence |
| Washburn Public Library |
| Washington Avenue Historic District |
| Washington Avenue Historic District |
| Washington Avenue Neoclassical Historic District |
| Washington Block |
| Washington County Courthouse and Jail |
| Washington Elementary School |
| Washington Elementary School |
| Washington Highlands Historic District |
| Washington Park Clubhouse |
| Washington School |
| Washington Street Historic District |
| Waterloo Downtown Historic District |
| Waterman, S. H., House |
| Water Street Commercial Historic District |
| Water Street Commercial Historic District |
| Water Street Historic District |
| Water Tower |
| Watson Street Commercial Historic District |
| Waubesa School |
| Waukesha Post Office |
| Waukesha Pure Food Company |
| Waupaca Free Public Library |
| Waupun Commercial Historic District |
| Waupun Post Office |
| Waupun Public Library |
| Wausau Club |
| Waushara County Courthouse, Waushara County Sheriff's Residence and Jail |
| Wauwatosa Arcade Building |
| Wauwatosa Avenue Residential Historic District |
| Wauwatosa Woman's Club Clubhouse |
| Wawbeek-Horace A.J. Upham House |
| Wayside House |
| Webb, Robert B. and Estelle J., House |
| Weber, Jacob, House |
| Weber Lake Picnic Ground Shelter |
| Weed, Justin, House |
| Wegner, C. H., House |
| Welch, C. A., House |
Data from United States Park Service and Wikidata
