Iowa - Area of significance: Architecture
| Wilson District #7 School |
| Wilson, John, House |
| Wilson, Paton and Hannah, House |
| Wilson, Seth and Elizabeth, House |
| Wilton Candy Kitchen |
| 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 |
| WOC Broadcasting Center |
| Wolf, Charles, House |
| Wolff, Philip A., House and Carriage House |
| Wolf, Mier, House |
| Wolters Filling Station |
| Woodbine Lincoln Highway and Brick Street Historic District |
| Woodbine Normal and Grade School |
| Woodbine Public Library |
| Woodbine Savings Bank |
| Woodbury County Courthouse |
| 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 |
| W. R. C. Hall |
| Wright County Courthouse |
| Wupperman Block/I.O.O.F. Hall |
| Yale High School Gymnasium |
| Yelland, Curtis, House |
| Yellow River State Forest Fire Tower |
| Y.M.C.A. Building |
| YMCA Building |
| Young, Alexander, Cabin |
| Youngblood, Tessa, House |
| Youngerman Block |
| Youngville Cafe |
| Zalesky, Frank E. and Katie (Cherveny), House |
| Ziepprecht Block |
| Zitterell, William J. and Hattie J., House |
| Zuhn Building |
| Zwemer Hall, Northwestern College |
Data from United States Park Service and Wikidata
