Iowa - Area of significance: Architecture
| Von Ach, Frank J., House |
| Voorhees, John K., House |
| Wabash Combination Depot-Moravia |
| Wabash Combination Depot-Shenandoah |
| Wahkonsa Hotel |
| Waln, Elijah D. and Mary J. (Adams), House |
| Walnut Street Baptist Church |
| Walnut Tire and Battery Co.-Globe Publishing Company Building |
| Walsh Flats/Langworth Building |
| Walter-Gimble House |
| Walter, Lowell E., House |
| Wanata State Park Picnic Shelter |
| Wapello County Courthouse |
| Wapsipinicon Mill |
| Wapsipinicon State Park Historic District |
| Warde, J. C. B., House |
| Ward, George H. and Loretta, House |
| Warfield, Pratt and Howell Company Warehouse |
| Warner Apartment Building |
| Warnock, Dr. Francis B., House |
| Warren Opera House Block and Hetherington Block |
| Warrior Hotel |
| Wartburg Teachers' Seminary |
| Washington and Elizabeth Miller Tract-Center-Soll Community Historic District |
| Washington Avenue Commercial Historic District |
| Washington County Courthouse |
| Washington Downtown Historic District |
| Washington Flats |
| Washington Gardens |
| Washington Junior High School and Jefferson Grade School |
| Washington Residential Historic District |
| Washington Township Center High School |
| Wasson, Dr. Jesse, Building |
| Waterfield, William, House |
| Waterloo East Commercial Historic District |
| Waterloo Masonic Temple |
| Waterloo Public Library (West Branch) |
| Watson's Grocery |
| Waverly House |
| Waverly Municipal Hydroelectric Powerhouse |
| WCF & N Center Point Depot and Substation |
| Weber, Alois and Annie, House |
| Weber House |
| Webster City Post Office |
| Webster County Courthouse |
| Webster, Dickinson, House |
| Weess, Frank J., House |
| Wehmer House |
| Wehner, Roland and Marilyn, House |
| Weins Commercial Building |
| Weis, Henry, House |
| Weitz, Charles H. and Lena May, House |
| Welch Apartments |
| Wells, George A., House |
| Wells-Stubbs House |
| Wentz, Jacob, House |
| Werthman Grocery |
| West Chester |
| West Eleventh Street Historic District |
| Western Hotel |
| West Grove United Methodist Church |
| West Hill Historic District |
| West Liberty Commercial Historic District |
| West Liberty Fairgrounds Historic District |
| West Main Street Residential Historic District |
| West Ninth Streetcar Line Historic District |
| West Paint Creek Synod Evangelical Lutheran Church and Cemetery |
| Westphal-Schmidt House |
| West Pleasant Street Historic District |
| West Side Residential Historic District |
| West Third Street Historic District |
| West, Wesley, House |
| Wheeler, John R., Jr., House |
| Wherry Block |
| Whitaker, Charles, House |
| White, Abiathar and Nancy, House |
| White, Arvine and Elizabeth W., House |
| White, H. A., General Store and House |
| Whitehead, C. H., House |
| White, Munger and Company, Store |
| White, Theodore, House |
| White, W. T. S., House and Carriage House |
| Whiting, Newell A., House |
| Whittier Friends Meeting House |
| Whittier School |
| Wickham-De Vol House |
| Wickham, O. P., House |
| Wieting Theater |
| Wild, Daniel and Margaret, House |
| Wilds, Col. John Q. and Rowena (Camp), House |
| Wildwood Park Historic District |
| Wilkinson, Thomas C., House |
| Willard, Leroy R., House |
| WILLIAM M. BLACK (dredge) |
| William O. and Mattie M. Coffee House |
| Williges Building |
| Willow-Bluff-3rd Street Historic District |
| Wilson, Anson, House |
| Wilson, Asa, House |
| Wilson Buildings |
Data from United States Park Service and Wikidata
