Massachusetts - Criteria: C (architecture/engineering)
| Swansea Village Historic District |
| Swasey, James, House |
| Sweet, Albert, House |
| Sweetser, Daniel, House |
| Sweetser, Michael, House |
| Sweetser, Warren, House |
| Swetland-Pease House |
| Swift, D. Wheeler, House |
| Sykes House |
| Symmes, Deacon John, House |
| Symmes, Marshall, House |
| Symmes, Stephen, Jr., House |
| Symonds, Thomas, House |
| Symphony and Horticultural Halls |
| Symphony Hall |
| Taconic and West Avenues Historic District |
| Taft, Aaron, House |
| Taft, Bazaleel, Jr., House and Law Office |
| Taft Brothers Block |
| Taft, George, House |
| Taft, Hon. Bazaleel, House |
| Taft, Moses, House |
| Taft, Samuel, House |
| Taft, Zadock, House |
| Tapin, Eugene, House |
| Tapley Building |
| Tarklin School |
| Tarpaulin Cove Light |
| Tashmoo Springs Pumping Station |
| Taunton Alms House |
| Taunton Green Historic District |
| Taunton Public Library |
| Taunton State Hospital |
| Tavern Acres Historic District |
| Tavern Farm, Old |
| Tay, Jesse, House |
| Taylor-Bray Farm |
| Taylor Square Firehouse |
| Teaticket School |
| Ted's Diner |
| Temple Building |
| Temple, Joseph, House |
| Temple, Mark, House |
| Temple Place Historic District |
| Templeton Common Historic District |
| Templeton Farm Colony |
| Tenney Homestead |
| Tenny Castle Gatehouse |
| Ten Pound Island Light |
| Terminal Storage Warehouse District |
| Tewksbury State Hospital |
| Textile District |
| Thaxter, Celia, House |
| Thayer, Benjamin, House |
| Thayer, Gen. Sylvanus, House |
| Thayer House |
| Thayer, Nathaniel, Estate |
| Thayer Public Library |
| Third Meetinghouse |
| Third Railroad Station |
| Thomas, H.P., House |
| Thomas-Webster Estate |
| Thom Block |
| Thompson, Abijah, House |
| Thompson School |
| Thompson Street School |
| Thomson, C.R., House and Barn |
| Thorndike, Capt. John, House |
| Thule-Plummer Buildings |
| Thumb, Tom, House |
| Tiffany-Leonard House |
| Tilton, D. Horace, House |
| Times and Olympia Buildings |
| Tisdale-Morse House |
| Tisza, Vera and Laszlo, House |
| Titcomb, Benaiah, House |
| Tobey Homestead |
| Tobey, Josiah, House |
| Tolman-Gay House |
| Topsfield Town Common District |
| Torpedo Boat PT-617 |
| Toussaint, Winand, House |
| Tower, Horatio, House |
| Towle, Loren, Estate |
| Town Brook Historic and Archeological District |
| Town Diner |
| Towne Farm |
| Towne Street Historic District |
| Town Farm, The |
| Town Hall |
| Town Hill District |
| Townsend House |
| Townsend House |
| Town Stable |
| Train, Samuel, House |
| Treadwell-Sparks House |
| Tremont Nail Factory District |
| Trinity Block |
| Trinity Church |
| Trinity Episcopal Church |
Data from United States Park Service and Wikidata
