Idaho - Role: Building
| University of Idaho Gymnasium and Armory |
| Upper Brownlee School |
| Upper Twin Lakes School |
| U.S. Inspection Statio-Porthill, Idaho |
| U.S. Post Office |
| US Post Office-Blackfoot Main |
| US Post Office-Bonners Ferry Main |
| US Post Office-Buhl Main |
| US Post Office-Caldwell Main |
| US Post Office-Kellogg Main |
| US Post Office-Nampa Main |
| US Post Office-Orofino Main |
| US Post Office-Payette Main |
| US Post Office-Preston Main |
| US Post Office-St. Anthony Main |
| US Post Office-Wallace Main |
| Ustick School |
| Van Hook, Jay, Potato Cellar |
| Van Wagener, Jacob B., Barn |
| Van Wagener, Jacob B., Caretaker's House |
| Varian, B. S., House |
| Victor Railroad Depot |
| Villeneuve, Charles and Martha, House |
| Vineyard, Charles C., House |
| Vinther and Nelson Cabin |
| Vipham, Thomas, House |
| Vollmer Building |
| Wallace Carnegie Library |
| Wallace, J. N., House |
| Wallentine Farmstead |
| Wargelin, Nickolai, Homestead |
| Warren Guard Station, Building 1206 |
| Warwas, Richard and Winnie, House |
| Washington County Courthouse |
| Watlington, Benjamin, House |
| Watt, W. H., Building |
| Waymire, C. H., Building |
| Webster, Archie, House |
| Weigle, William, House and Water Tank |
| Weilermann, Gus, House |
| Weiser Oregon Short Line Railroad Depot |
| Weiser Post Office |
| Welch, Edward, House |
| Wellman Apartments |
| Werthheimer Building |
| West Point Grade School |
| Whitehead, William, House |
| White Spring Ranch |
| Whitestone Hotel |
| Whitney, Grant, House |
| Whitney School |
| Wickahoney Post Office and Stage Station |
| Wiley, Orton H., House |
| Wilkinson, Clyde, House |
| Wilson House |
| Wolters Double Houses |
| Wood River Center Grange No. 87 |
| Woodward Building |
| Woolley Apartments |
| Wyatt, W. R. and Louisa E., House |
| Young, Samuel and Ann, House |
| Zurcher Apartments |
Data from United States Park Service and Wikidata
