Massachusetts - Area of significance: Architecture
| Union Station |
| Union Street Historic District |
| Union Trust Company Building |
| Union Wharf |
| Unitarian Memorial Church |
| Unitarian Society, The |
| Unitarian Universalist Church and Parsonage |
| United Electric Co. Building |
| United First Parish Church (Unitarian) of Quincy |
| United Shoe Machinery Corporation Building |
| United Shoe Machinery Corporation Clubhouse |
| United State Post Office, Courthouse, and Federal Building |
| United States Watch Company |
| United States Whip Company Complex |
| Universalist Society Meetinghouse |
| University Hall, Harvard University |
| Upham, Phineas, House |
| Uphams Corner Historic District |
| Upham's Corner Market |
| Upper Chapin Street Historic District |
| Upper Historic District |
| Upper Magazine Street Historic District |
| Upper Main Street Historic District |
| Upper North Street Commercial District |
| Upper Worthington Historic District |
| Upsala Street School |
| Upton Center Historic District |
| Upton State Forest-Civilian Conservation Corps Resources Historic District |
| Upton Town Hall |
| Urban Rowhouse |
| Urban Rowhouse |
| Urban Rowhouse |
| U.S. Customhouse |
| US Customhouse |
| U.S. Customshouse |
| U.S. Marine Hospital at Vineyard Haven |
| US Post Office |
| U.S. Post Office and Courthouse |
| US Post Office-Arlington Main |
| US Post Office-Attleboro Main |
| US Post Office-Beverly Main |
| US Post Office-Central Square |
| US Post Office-Easthampton Main |
| US Post Office Garage |
| US Post Office-Great Barrington Main |
| US Post Office-Greenfield Main |
| US Post Office-Holyoke Main |
| US Post Office-Lexington Main |
| US Post Office-Lynn Main |
| US Post Office-Medford Main |
| US Post Office-Middleborough Main |
| US Post Office-Millbury Main |
| US Post Office-Milton Main |
| US Post Office-Newburyport Main |
| US Post Office-Palmer Main |
| US Post Office-Provincetown Main |
| US Post Office-Quincy Main |
| US Post Office-Salem Main |
| US Post Office-Somerville Main |
| US Post Office-South Hadley Main |
| US Post Office-Taunton Main |
| US Post Office-Wakefield Main |
| US Post Office-Waltham Main |
| US Post Office-Weymouth Landing |
| US Post Office-Whitinsville Main |
| US Post Office-Williamstown Main |
| US Post Office-Winchester Main |
| US Post Office-Woburn Center Station |
| Uxbridge Common District |
| Uxbridge Passenger Depot |
| Uxbridge Town Hall |
| Valentine-French House |
| Valentine School |
| Valentine Soap Workers Cottage |
| Valentine Soap Workers Cottage |
| Vale, The |
| Vamp Building |
| Vanderhoop, Edwin DeVries, Homestead |
| Van Deusen, H. M., Whip Company |
| Varnum Building |
| Varnum School |
| Vaughn, H. G., House |
| Vendome, The, and the St. Ives |
| Ventfort Hall |
| Vermont Building |
| Verona, Apartments, The |
| Viall, Samuel, House |
| Vickery-Baylies House |
| Vickery, Capt. David, House |
| View Street Historic District |
| Villa Virginia |
| Vinal, Albert, House |
| Vinton, Alfred, House |
| Vinton-Boardman Farmhouse |
| Vinton-Torrey House |
| Vintonville Historic District |
| Waban Branch Library |
| Wachusett Aqueduct Linear District |
| Wachusett Dam Historic District |
| Wachusett Shirt Company |
Data from United States Park Service and Wikidata
