Maryland - Criteria: C (architecture/engineering)
| Upper Fells Point Historic District |
| Upper Marlboro Residential Historic District |
| Upton |
| U.S. Atomic Energy Commission |
| U.S. Coast Guard Yard Curtis Bay |
| U.S. Custom House |
| U.S. Naval Academy |
| U.S. Post Office and Courthouse |
| US Post Office-Hyattsville Main |
| Utica Covered Bridge |
| Valentia |
| Valhalla |
| Valley Cottage |
| Victorian Corn Cribs |
| Villa Anneslie |
| Villa DeSales |
| Vineyard, The |
| Waddy House |
| Wailes, F. Leonard, Law Office |
| Warfield Complex, Hubner, and T Buildings |
| Washington County Courthouse |
| Washington, George, House |
| Washington Grove Historic District |
| Washington Monument |
| Washington Street Historic District |
| Waterloo |
| Waters' River |
| Watkins Point Farm |
| Waverley |
| Waverley |
| Waverly |
| Waverly Main Street Historic District |
| Waverly Street Bridge |
| Weaver-Fox House |
| Webster's Forest |
| Weiskittel-Roehle Burial Vault |
| Wesley Chapel Methodist Episcopal Church |
| West Denton Warehouse-Wharf |
| Western Fields |
| Western Maryland Railway, Cumberland Extension Right-of-Way, Mile 126 to Mile 159.8 |
| Western Maryland Railway Station |
| Western Run-Belfast Road Historic District |
| Wester Ogle |
| Westminster Historic District |
| Westminster Presbyterian Church and Cemetery |
| West Montgomery Avenue Historic District |
| West Nottingham Academy Historic District |
| West Nottingham Meetinghouse |
| West Riverdale Historic District |
| West St. Mary's Manor |
| Whitaker's Mill Historic District |
| Whiteford-Cardiff Historic District |
| Whitehall |
| White Hall |
| White Hall |
| Whitehaven Historic District |
| Whitehaven Hotel |
| White House Farm |
| Widehall |
| Widrick, George, House |
| Wilderness, The |
| Wildfell |
| Wilkens-Robins Building |
| Willard, George,House |
| Williams' Conquest |
| Williams Grove |
| Williams Plains |
| Williamsport Historic District |
| Williston Mill Historic District |
| Willow Glenn |
| Willow Grove |
| Willows, The |
| Wilson-Miller Farm |
| Wilson, Rufus, Complex |
| Wilson's Bridge |
| Wilson School |
| Wilson's Inheritance |
| Wilton |
| Windsor Hills Historic District |
| Winemiller Family Farm |
| Winsted |
| Woburn Manor |
| Wolfe, James K.P., House |
| Woman's Industrial Exchange |
| Woodberry Historic District |
| Woodend |
| Woodland Hall |
| Woodlands |
| Woodlawn |
| Woodlawn |
| Woodside |
| Woods Mill Farm |
| Woodstock |
| Woodview |
| Woodwardville |
| Worthington Valley Historic District |
| Wright, Robert Llewellyn, House |
| Wye Hall |
| Wye House |
| Wye Town Farm House |
Data from United States Park Service and Wikidata
