Connecticut - Role: Building
| Abbott, George S., Building |
| Abington Congregational Church |
| Academy Hall |
| Acadian House |
| Aeolian Company Factory Complex |
| Aetna Diner |
| Agudath Sholem Synagogue |
| Ahavas Sholem Synagogue |
| Aldrich Free Public Library |
| Alldis, James, House |
| Allen House, The |
| Allen's Cider Mill |
| Allis-Bushnell House |
| Allyn, Capt. Benjamin, II, House |
| Alsop, Richard IV, House |
| Ambassador Apartments |
| American Legion Forest CCC Shelter |
| American Mills Web Shop |
| Ames, Winslow, House |
| Anderson, Leroy, House |
| Andrews, Luman, House |
| Andrews, Moses, House |
| Andrew, William, House |
| Anshei Israel Synagogue |
| Ansonia Library |
| Apartment at 49-51 Spring Street |
| Applewood Farm |
| Armsmear |
| Armstrong, M. and Company Carriage Factory |
| Armstrong Rubber Company Building |
| Ashford Academy |
| Ashlawn |
| Atwater, George, House |
| Atwater-Linton House |
| Atwater Manufacturing Company |
| Austin, A. Everett, House |
| Avery Homestead |
| Avery House |
| Avery, Thomas, House |
| Avon Congregational Church |
| Babb's Beach |
| Backus, Nathaniel, House |
| Bacon Academy |
| Bacon, Jabez, House |
| Baldwin, Amos, House |
| Baldwin, Caleb, Tavern |
| Baldwin, George, House |
| Baldwin, Timothy, House |
| Baldwin, Zaccheus, House |
| Ball and Roller Bearing Company |
| Barber, Giles, House |
| Barbour, Lucius, House |
| Barker, John, House |
| Barlow, Aaron, House |
| Barlow, Boce W., Jr., House |
| Barnard, Henry, House |
| Barnes-Frost House |
| Barnes, Selah, House |
| Barns, Acors, House |
| Barnum Museum |
| Bartlett, Daniel and Esther, House |
| Basset, Daniel, House |
| Batterson Block |
| Beach, Charles E., House |
| Beach, Samuel, House |
| Beardsley, Capt. Philo, House |
| Beardsley-Mix House |
| Belden, Horace, School and Central Grammar School |
| Beleden House |
| Bellamy, Joseph, House |
| Bemont, Makens, House |
| Benedict, Francis Jr., House |
| Benedict House and Shop |
| Benedict-Miller House |
| Beth El Synagogue |
| Beth Hamedrash Hagodol Synagogue |
| Beth Israel Synagogue |
| Beth Israel Synagogue |
| Bigelow-Hartford Carpet Mills |
| Bikur Cholim Synagogue |
| Bill, Gurdon, Store |
| Bingham, Clarence A., School |
| Bishop, Peyton Randolph, House |
| Bishop School |
| Bissell, Henry B., House |
| Bissell Tavern-Bissell's Stage House |
| Black Horse Tavern |
| Blackman, Elisha, Building |
| Blackstone House |
| Blakeslee Forging Company |
| Blakeslee, Joseph, House |
| Bloomfield Avenue Meeting House |
| Booth, Nathan B., House |
| Bosworth, Benjamin, House |
| Bowen, Henry C., House |
| Bowen, Mathew, Homestead |
| Bozrah Congregational Church and Parsonage |
| B.P.O. Elks Lodge |
| Brace, Moses-Uriah Cadwell House |
| Bradford-Huntington House |
Data from United States Park Service and Wikidata
