California - Area of significance: Architecture
| Wheeler Hospital |
| Whelan, John A., House |
| Whifler, William A., House |
| White Mansion |
| White, Michael, Adobe |
| Whitley Court |
| Whitley Heights Historic District |
| Whitmore, Daniel, House |
| Whittier Mansion |
| Wigwam Village No. 7 |
| Wilcox, Benjamin, House |
| Wilford, Albert, Houses |
| Williams, E. Stewart and Mari, House |
| William Shipsey House |
| Williams, Roger Y., House |
| Willits Carnegie Library |
| Willits Depot |
| Willmore, The |
| Wilmington Branch |
| Wilshire Branch |
| Wilshire Vista West Historic District |
| Wilson House |
| Wilson, Warren, Beach House |
| Wilton Historic District |
| Winchester House |
| Winehaven |
| Winehaven Historic District |
| Winona Boulevard Mid-Century Modern Historic District |
| Winship-Smernes Building |
| Winters House |
| Withington, George and Eliza, House |
| Witter, Edwin, Ranch |
| Woelke, John, House |
| Woman's Athletic Club of San Francisco |
| Woman’s Club of Bakersfield |
| Woman's Club of Lodi |
| Woman's Club of Palo Alto |
| Woman's Club of Redondo Beach |
| Woman's Improvement Club Clubhouse |
| Women's Athletic Club of Alameda County |
| Women's Twentieth Century Club of Eagle Rock |
| Woodbridge Masonic Lodge No. 131 |
| Woodbury-Story House |
| Woodhills |
| Woodland Opera House |
| Woodland Public Library |
| Woodleaf Hotel |
| Woodside Store |
| Wood, Walter B., House |
| Workman Adobe |
| Wright, George L., House |
| Wright, Lloyd, Home and Studio |
| Wrigley, William, Jr., Summer Cottage |
| Wynyate |
| X-100 |
| Yamashiro Historic District |
| Yerba Buena Island Lighthouse |
| YMCA Hotel |
| Yolo Branch Library |
| Yolo County Courthouse |
| Yorba, Domingo Adobe and Casa Manuel Garcia |
| Yorba-Slaughter Adobe |
| York House |
| Yosemite Transportation Company Office |
| Yosemite Valley |
| Yosemite Valley Bridges |
| Yosemite Valley Chapel |
| Yosemite Village Historic District |
| Yost Theater-Ritz Hotel |
| Young, Earl and Virginia, House |
| Young Men's Christian Association-Santa Ana-Tustin Chapter |
| Young's Market Company Building |
| Yount, Eliza G., House |
| Yountville Grammar School |
| Yreka Carnegie Library |
| Yung See San Fong House |
| Y.W.C.A. Building |
| Zalud House |
| Zanone, Magdalena House |
| Zentgraf, Jacob, House |
| Ziegler Estate |
| Zschokke, Theodore, Cottages |
Data from United States Park Service and Wikidata
