Connecticut - Role: Building
| United Illuminating Company Building |
| United States Post Office and Court House |
| United States Post Office, Westport, Connecticut |
| U.S. Post Office |
| U. S. Post Office and Federal Building |
| US Post Office-Ansonia Main |
| US Post Office-Bridgeport Main |
| US Post Office-Greenwich Main |
| US Post Office-Manchester Main |
| US Post Office-Meriden Main |
| US Post Office-Milford Main |
| US Post Office-Naugatuck Main |
| US Post Office-New London Main |
| US Post Office-Norwich Main |
| US Post Office-South Norwalk Main |
| US Post Office-Stamford Main |
| Viets' Tavern |
| Villa Bella Vista |
| Villa Friuli |
| Wadsworth Atheneum |
| Waldo, Edward, House |
| Wallingford Railroad Station |
| Waltersville School |
| Ward-Heitman House |
| Ward, William and Mary, House |
| Ward, William, Jr., House |
| Warner House |
| Warner, Jonathan, House |
| Warner Theatre |
| War Office |
| Warren Congregational Church |
| Warrenton Woolen Mill |
| Washington School |
| Washington Street School |
| Waterbury Clock Company |
| Waterbury Union Station |
| Webb, David Jr. and Sarah, House |
| Webb, Joseph, House |
| Webster, Horace, Farmhouse |
| Webster Memorial Building |
| Webster, Noah, Birthplace |
| Webster, Noah, Memorial Library |
| Webster School |
| Welch, David, House |
| Welch Training School |
| Welles, Gideon, House |
| Welles-Shipman-Ward House |
| Wells, John, Jr., House |
| Westbrook Town Center Historic District |
| West End Commercial District |
| West End Congregation-Achavath Achim Synagogue |
| West End Library |
| Westport Bank and Trust Company |
| West Street School |
| Wethersfield Avenue Car Barn |
| Wetmore, Seth, House |
| Wheeler, Adin, House and Theodore F. Wheeler Wheelwright Shop |
| Wheeler-Beecher House |
| Wheeler Block |
| Wheeler, Ephraim, House |
| Wheeler, Jonathan, House |
| Whitehall Mansion |
| White-Overton-Callander House |
| White's Tavern |
| Whitfield Cowles House |
| Whitfield, Henry, House |
| Whitfield, Henry, House |
| Whiting Homestead |
| Whitman House |
| Whitneyville Congregational Church |
| Whittlesey, Ambrose, House |
| Whittlesey, John, Jr., House |
| Wiard, John, House |
| Widows' Home |
| Wightman, Rev. John, House |
| Wightman, Valentine, House |
| Wilby High School |
| Wilcox, Josiah, House |
| Wildman, E. A., & Co. Tobacco Warehouse |
| Willard Homestead |
| Williams and Stancliff Octagon Houses |
| Williams, Austin F., Carriagehouse and House |
| Williams, Captain Benjamin House |
| Williams, Eleazer, House |
| Williams House |
| Williams Memorial Institute |
| Williams, Warham, House |
| Williams, William, House |
| Willimantic Armory |
| Willimantic Elks Club |
| Willimantic Freight House and Office |
| Wilson, John, House |
| Windsor Avenue Congregational Church |
| Windsor Locks Passenger Station |
| Winsted Hosiery Mill |
| Winthrop Mill |
| Witter House |
| Wolcott, Oliver, House |
| Woodbridge Farm |
| Woodbridge Farmstead |
Data from United States Park Service and Wikidata
