Massachusetts - Criteria: A (event)
| St. Joseph's School |
| St. Louis Church |
| St. Luke's and St. Margaret's Church |
| St. Mary's Cathedral and Rectory |
| St. Mary's Catholic Church |
| St. Mary's Complex |
| St. Mary's Episcopal Church |
| St. Mary's Roman Catholic Church Complex |
| St. Michael's Church |
| St. Nicholas Orthodox Church and Rectory |
| Stockbridge Casino |
| Stoliker, Edna, Three-Decker |
| Stone Building |
| Stone, Edward, Three-Decker |
| Stone, Lorenzo R., House |
| Stone's Bridge |
| Stony Brook-Factory Village Historic District |
| Stony Brook Reservation Parkways, Metropolitan Park System of Great Boston MPS |
| Stony Farm |
| Story Grammar School |
| Stoughtonham Furnace Site |
| Stoughton Railroad Station |
| St. Patrick's Church |
| St. Patrick's Church |
| St. Paul's Parish Church |
| St. Peter's Roman Catholic Church-St. Mary's School |
| Straightsmouth Island Light |
| Strathmore Road Historic District |
| Stratton, Edward B., House |
| St. Stephen's Church |
| St. Stephen's Memorial Church |
| St. Thomas Epsicopal Church |
| Students House |
| Sturbridge Common Historic District |
| Sturtevant, Leonard, House |
| Sudbury Aqueduct Linear District |
| Sudbury Center Historic District |
| Sudbury Dam Historic District |
| Suffolk County Jail |
| Suffolk Resolves House |
| Sullivan, Edward, House |
| Sullivan's Corner Historic District |
| Summer Street Historic District |
| Sumner, George, House |
| Sumner Hill Historic District |
| Sunderland Center Historic District |
| Superior Courthouse and Bartlett Mall |
| Sutton Block |
| Sutton Center Historic District |
| Swampscott Cemetery |
| Swampscott Fish House |
| Swampscott Railroad Depot |
| Swan, Asie, House |
| Swansea Friends Meetinghouse and Cemetery |
| Swansea Village Historic District |
| Swasey, James, House |
| Sweetser, Daniel, House |
| Sykes House |
| Symmes, Deacon John, House |
| Symmes, Marshall, House |
| Symmes, Marshall, Tenant House |
| Symphony Hall |
| Tack Factory, The |
| Taconic and West Avenues Historic District |
| Taft, Aaron, House |
| Taft, Hon. Bazaleel, House |
| Tantiusques Reservation |
| Tapin, Eugene, House |
| Tapley Building |
| Tarklin School |
| Tarpaulin Cove Light |
| Tashmoo Springs Pumping Station |
| Taunton Green Historic District |
| Taunton Public Library |
| Taunton State Hospital |
| Tavern Acres Historic District |
| Tavern Farm, Old |
| Tay, Jesse, House |
| Taylor-Bray Farm |
| Teaticket School |
| Ted's Diner |
| Telegraph Hill |
| Temple Building |
| Temple Israel Cemetery |
| Temple Place Historic District |
| Templeton Common Historic District |
| Templeton Farm Colony |
| Ten Pound Island Light |
| Terminal Storage Warehouse District |
| Tewksbury State Hospital |
| Textile District |
| Thayer, Benjamin, House |
| Thayer, Nathaniel, Estate |
| Thayer Public Library |
| Third Railroad Station |
| Thom Block |
| Thompson, Abijah, House |
| Thompson School |
| Thompson Street School |
| Thule-Plummer Buildings |
Data from United States Park Service and Wikidata
