Iowa - Significance region: Local
| Watson's Grocery |
| Waverly East Bremer Avenue Commercial Historic District |
| Waverly House |
| Waverly Municipal Hydroelectric Powerhouse |
| WCF & N Center Point Depot and Substation |
| Weber, Alois and Annie, House |
| Webster City Post Office |
| Webster County Courthouse |
| Webster, Dickinson, House |
| Weess, Frank J., 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 |
| Wentz, Jacob, House |
| Werthman Grocery |
| West Branch Commercial Historic District |
| West Chester |
| West Eleventh Street Historic District |
| West Grove United Methodist Church |
| West Hill Historic District |
| West Jefferson Street 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 Side Third Avenue SW. Commercial Historic District |
| West Third Street Historic District |
| West Union Commercial 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 |
| Wickiup Hill Late Woodland Village Site |
| Wickiup Hill Middle to Late Archaic Camp Site |
| Wickiup Hill Mound Group No. 1 |
| Wickiup Hill Mound Group No. 2 |
| Wickiup Hill Mound Group No. 3 |
| Wickiup Hill Mound Group No. 4 |
| Wieting Theater |
| Wild, Daniel and Margaret, House |
| Wild Historic District |
| Wilds, Col. John Q. and Rowena (Camp), House |
| Wildwood Park Historic District |
| Wilkinson, Thomas C., House |
| William O. and Mattie M. Coffee House |
| Williamson School |
| Williams, Seneca, Mill |
| Willow-Bluff-3rd Street Historic District |
| Wilson, Anson, House |
| Wilson, Asa, House |
| Wilson Buildings |
| Wilson District #7 School |
| Wilson, John, House |
| Wilson, Paton and Hannah, House |
| Wilson, Seth and Elizabeth, House |
| Wilton Commercial Historic District |
| Windrem House |
| Winnebago County Courthouse |
| Winterset City Park Historic District |
| Winterset Courthouse Square Commercial Historic District |
| Winterset High School |
| Winterset Municipal Power Plant |
| Wishard, Henry, House |
| Witwer Grocery Company Building |
| WOC Broadcasting Center |
| Wolf, Charles, House |
| Wolff, Philip A., House and Carriage House |
| Wolters Filling Station |
| Women's Christian Temperance Union Public Fountain |
| Woodbine Lincoln Highway and Brick Street Historic District |
| Woodbine Normal and Grade School |
| Woodbine Public Library |
| Woodbine Savings Bank |
| Wood, Jeremiah, House |
| Woodland Place Historic District |
| Woodlawn Cemetery Gates and Shelter |
| Woodlawn Historic District |
| Woods, Oscar C., House |
| Wood, William Kennison, House |
| Worley, Philip, House |
| Worth County Courthouse |
Data from United States Park Service and Wikidata
