Connecticut - Area of significance: Exploration/Settlement
| Baldwin, Timothy, House |
| Baldwin, Zaccheus, House |
| Beach, Samuel, House |
| Bean Hill Historic District |
| Beardsley-Mix House |
| Black Horse Tavern |
| Blackstone House |
| Brace, Moses-Uriah Cadwell House |
| Bradley, Timothy, House |
| Brooklyn Green Historic District |
| Burnham Tavern |
| Burrall-Belden House |
| Bush Hill Historic District |
| Butler, James, House |
| Caleb Pratt House |
| Canterbury Center Historic District |
| Central Avenue-Center Cemetery Historic District |
| Colton, Benjamin, House |
| Columbia Green Historic District |
| Dayville Historic District |
| Dickerman II, Jonathan, House |
| Downtown Seymour Historic District |
| Dudleytown Historic District |
| Ely, Rev. John, House |
| Farnsworth, Samuel, House |
| Gillett, Asa, House |
| Goodman, Timothy, House |
| Greenwood Avenue Historic District |
| Griswold Point Historic District |
| Harrison, Thomas, House |
| Hatheway House |
| High Street Historic District |
| Hoadley, Isaac, House |
| Hoadley, John, House |
| Hoadley, Orrin, House |
| Holcomb, Nathaniel, III, House |
| Hosmer, Daniel, House |
| House at 161 Damascus Road |
| House at 29 Flat Rock Road |
| House at 847 Main Street, North |
| Howd, Eliphalet, House |
| Jones, Theophilus, House |
| Lambert, David, House |
| Laurel Hill Historic District |
| Lawrence, Isaac, House |
| Lighthouse Archeological Site (5-37) |
| Litchfield Historic District |
| Lord, Capt. Enoch, House |
| Lyon, Thomas, House |
| Mallett, David, Jr., House |
| Mansfield Center Cemetery |
| Milton Center Historic District |
| Monroe Center Historic District |
| Moore, Deacon John, House |
| Mystic River Historic District |
| New Preston Hill Historic District |
| Newtown Borough Historic District |
| North Branford Center Historic District |
| Norton House |
| Palisado Avenue Historic District |
| Palmer, Capt. Nathaniel B., House |
| Palmer, Hezekiah, House |
| Palmer, Isaac, House |
| Pequot Fort |
| Plainfield Street Historic District |
| Post Hill Historic District |
| Pratt House |
| Preston City Historic District |
| River Park Historic District |
| Rogers, John, House |
| Seymour, Elisha, Jr., House |
| Sherman Historic District |
| Smith, Jabez, House |
| South Glastonbury Historic District |
| Stanley-Woodruff-Allen House |
| Steele, Allyn, House |
| Sterling Hill Historic District |
| Stratford Center Historic District |
| Strong House |
| Tolland Green Historic District |
| Tyler, John, House |
| Tyler, Solomon, House |
| Union Green Historic District |
| Waveny |
| Webb, David Jr. and Sarah, House |
| Wells, John, Jr., House |
| West End North Historic District |
| White-Overton-Callander House |
| Whitman House |
| Wiard, John, House |
| Wilson, John, House |
| Wilton Center Historic District |
| Winsted Green Historic District |
| Winthrop Mill |
| Woodstock Hill Historic District |
| Worthington Ridge Historic District |
| Yeomans, Edward, House |
Data from United States Park Service and Wikidata
