Connecticut - Area of significance: Social History
| Greenwich Town Hall |
| Greenwich YMCA |
| Greenwood Avenue Historic District |
| Gurleyville Historic District |
| Haddam Center Historic District |
| Hall, Isaac Davis and Marion Dalton, House |
| Hallville Mill Historic District |
| Hamden High School |
| Hamden Memorial Town Hall |
| Hartford Colony |
| Hartford Golf Club Historic District |
| Hattertown Historic District |
| Haviland and Elizabeth Streets-Hanford Place Historic District |
| Haystack Mountain Tower |
| Hempstead Historic District |
| Hempstead, Joshua, House |
| Hempsted, Nathaniel, House |
| Holcomb, Nathaniel, III, House |
| Hooker, Elizabeth R., House |
| Hose and Hook and Ladder Truck Building |
| Hotchkissville Historic District |
| Hotel America |
| House at 130 Mohegan Avenue |
| Huntington Center Historic District |
| Huntington Street Baptist Church |
| Ivoryton Historic District |
| Jail Hill Historic District |
| Kensington Grammar School-Jean E. Hooker High School |
| Kensington Soldier's Monument |
| Kettle Creek Historic District |
| Kimberly Mansion |
| Kings Highway North Historic District |
| Kinne Cemetery |
| Knowlton Memorial Hall |
| Lakeview Village Historic District |
| Lakeville Manor |
| Lamb Homestead |
| Le Roy Shirt Company Factory |
| Lester, Timothy, Farmstead |
| Lighthouse Archeological Site (5-37) |
| Lighthouse Inn |
| Little Haddam Historic District |
| Little Hollywood Historic District |
| Little Plain Historic District |
| Lord, Capt. Enoch, House |
| Main Street Historic District |
| Main Street Historic District |
| Main Street Historic District |
| Mallett, David, Jr., House |
| Manchester Historic District |
| Mansfield Training School and Hospital |
| Martin, Caleb, House |
| Massacoe Forest Pavilion |
| Mechanic Street Historic District |
| Memorial Hall |
| Meriden Avenue-Oakland Road Historic District |
| Middlebury Center Historic District |
| Middletown Alms House |
| Montauk Avenue Historic District |
| Moody, Dr. Mary B., House |
| Mory's |
| Murphy, Charles and Peggy House |
| Nathaniel Wheeler Memorial Fountain |
| Nathaniel Witherell Historic District |
| Naubuc Avenue-Broad Street Historic District |
| Naugatuck Center Historic District |
| New Haven Armory |
| New Haven District Campground |
| New Haven Jewish Home for the Aged |
| New Haven Lawn Club |
| Newtown Borough Historic District |
| Norfield Historic District |
| Norfolk Historic District |
| Northford Center |
| Norwich Hospital District |
| Oak Lodge |
| Ogden, David, House |
| Oil Mill Historic District |
| Old Middletown High School |
| Old Newgate Prison |
| Old North Cemetery |
| Old Town Hall |
| Old Town Hall |
| Orange Street Historic District |
| Oxford-Whitney Streets Historic District |
| Palmer, John, House |
| Palmer, Luther, House |
| Park Apartments |
| Parkville Historic District |
| Parmelee House |
| Paugnut Forest Administration Building |
| Peoples Forest Museum |
| Pequot Colony Historic District |
| Pequotsepos Manor |
| Perkins-Rockwell House |
| Pine Meadow Historic District |
| Plymouth Center Historic District |
| Polish National Home |
| Pomfret Street Historic District |
| Prospect Avenue Historic District |
Data from United States Park Service and Wikidata
