Connecticut - Area of significance: Social History
| Prospect Green Historic District |
| Prospect Street Historic District |
| Quaker Hill Historic District |
| Raymond-Bradford Homestead |
| Red Mountain Shelter |
| Remington City Historic District |
| Remington Village Historic District |
| Restmore |
| Riverton Historic District |
| Robbins, Unni II, House |
| Rock Hall |
| Rockwell Park |
| Rocky Hill Center Historic District |
| Rocky Neck Pavilion |
| Round Hill Historic District |
| Russian Village Historic District |
| Rye House |
| Sage-Kirby House |
| Saint Luke's Home for Destitute and Aged Women |
| Salem Historic District |
| Sanford Road Historic District |
| Sanseer Mill |
| Scoville Memorial Library |
| Seaside Institute |
| Seaside Village Historic District |
| Shade Swamp Shelter |
| Sharon Historic District |
| Sharon Valley Historic District |
| Sherman Historic District |
| Simpson, Dr. Frank T., House |
| Simpson, Samuel, House |
| Sisson-South Whitney Historic District |
| Slater Library and Fanning Annex |
| Sleeping Giant Tower |
| South School |
| Springbank |
| Spring Grove Cemetery |
| Spring Hill Historic District |
| State Park Supply Yard |
| Steward's House, Foreign Mission School |
| St. John's Episcopal Church |
| St. John's Protestant Episcopal Church |
| St. Mary's Parochial School |
| Stonington Cemetery |
| Stowe, Harriet Beecher, House |
| Sts. Cyril and Methodius Church |
| Suburban Club |
| Swallen, James, House |
| System House |
| Taftville |
| Talcottville Historic District |
| The Lodges Historic District |
| Thomaston Opera House |
| Thompson, William H., Farmstead |
| Tolland Green Historic District |
| Town Farms Inn |
| Trinity Church |
| Trowbridge Square Historic District |
| Tunxis Forest Headquarters House |
| Tunxis Forest Ski Cabin |
| Uncasville School |
| Union Baptist Church |
| Union Society of Phoenixville House |
| Union Village Historic District |
| United States Housing Corporation Historic District |
| Upper Albany Historic District |
| Viets' Tavern |
| Villa Friuli |
| Village Creek |
| Vine Street Apartment Buildings |
| Walnut Grove |
| Ward, William and Mary, House |
| Warner, Jonathan, House |
| Watertown Center Historic District |
| Wauregan Historic District |
| Waveny |
| Webb, David Jr. and Sarah, House |
| Webster Memorial Building |
| Welles, Gideon, House |
| West End Commercial District |
| Wethersfield Avenue Car Barn |
| Wheeler Block |
| White-Overton-Callander House |
| Whitfield Cowles House |
| Whitfield, Henry, House |
| Whitney Avenue Historic District |
| Widows' Home |
| Williams, Austin F., Carriagehouse and House |
| Williams, Captain Benjamin House |
| Willimantic Armory |
| Wilmot Apartments Historic District |
| Winchester Soldiers' Monument |
| Windsor Avenue Congregational Church |
| Windsor Farms Historic District |
| Wolcott Green Historic District |
| Woodbridge Farm |
| Wood, Harcourt, Memorial Library |
| Woodstock Hill Historic District |
| Woodworth, Nathan A., House |
| Working Girls' Vacation Society Historic District |
Data from United States Park Service and Wikidata
