Colorado - Significance region: Local
| West Side Historic District |
| Westside Neighborhood |
| Wetmore Post Office |
| Wheeler Bank |
| Wheeler Bridge |
| Wheeler Opera House |
| White, Asbury, House |
| White-Plumb Farm |
| White School |
| White, William Allen, Cabins |
| Wildhack's Grocery Store-Post Office |
| Wiley Rock Schoolhouse |
| Willow Creek Park |
| Willows School |
| Wilson, Blanche A., House |
| Wilson, S.A., Elementary School |
| Wind Ridge |
| Windsor Town Hall |
| Wolfe, John, House |
| Woodbury, Joseph A., House |
| Wood-Morris-Bonfils House |
| Woods Lake Resort |
| Woodward-Baird House |
| Wrightsman House |
| Young Women's Christian Association |
| Ypsilon Lake Trail |
| Yust, E. C., Homestead |
| Y.W.C.A. |
| Zall House |
| Zang, Adolph J., House |
| Zang, Adolph, Mansion |
| Zang’s Hotel and Annex |
| Zapata Ranch Headquarters |
| Zeitz Buckhorn Exchange |
| Zion's German Lutheran Church |
Data from United States Park Service and Wikidata
