All - Constructed - 1820–1829
| Abbott-Page House |
| Abyssinian Meeting House |
| Acworth Congregational Church |
| Adams-Ryan House |
| Adsit House |
| Agler-La Follette House |
| Aldrich, Aaron, House |
| Alexander, William T., House |
| Allegheny Aqueduct |
| Appleton, Nathan, Residence |
| Applewood Farm |
| Arbuckle, Alexander W., I, House |
| Arlington Plantation House |
| Arnold-Palmer House |
| Ashford Academy |
| Ashtabula |
| Atwater, George, House |
| Baker, Benjamin, Jr., House |
| Baker Island Light Station |
| Baker, James, House |
| Bangor Theological Seminary Historic District |
| Barcelona Lighthouse and Keeper's Cottage |
| Barnes, James B., House |
| Batavia Cemetery |
| Batchelder, George, House |
| Battle Monument |
| Baxter, Shubael, House |
| Bayly, Mountjoy, House |
| Bedford Plantation |
| Beebe Estate |
| Bell Tower |
| Bemis Mill |
| Bethel Presbyterian Church |
| Bethesda Presbyterian Church |
| Bialystoker Synagogue |
| Bingham-Brewer House |
| Bisbee Mill |
| Black House |
| Black Mansion |
| Blair House |
| Blakeley |
| Blooming Grove Church |
| Blumenschein, Ernest L., House |
| Boardman, E., House |
| Bordelon, Hypolite, House |
| Bottle House Block |
| Boxley, George, Cabin |
| Brandeis, Louis, House |
| Brandywine Shoal Light Station |
| Brents-Lisle House |
| Bristol County Jail |
| Brookwood Farm |
| Brotherton Farm |
| Brownville Hotel |
| Buchanan, James, House |
| Burleigh |
| Burnside Plantation House |
| Burnt Island Light Station |
| Burroughs-Foland Farm |
| Burtner Stone House |
| Butterfield-Sampson House |
| Byler Road |
| Cabanne Archeological Site |
| Calhoun Mine |
| Cape Charles Light Station |
| Cape Florida Lighthouse |
| Cape May Lighthouse |
| Capitol Park |
| Carll House |
| Carysfort Lighthouse |
| Casa del Rey |
| Cedar Grove |
| Cedar Lawn |
| Cedarock Park Historic District |
| Cedar Park |
| Cedar Springs Historic District |
| Centenary College |
| Chambers-Morgan Farm |
| Champ, Thomas, House |
| Chase, Lemuel B., House |
| Chericoke |
| China Grove |
| Christ Church |
| Christ Episcopal Church |
| Christ Episcopal Church |
| Christ Episcopal Church and Parish House |
| Church of the Holy Ascension |
| Church-Waddel-Brumby House |
| Claremont |
| Cleale, Joseph, House |
| Clinton House |
| Coleman-White House |
| Colleton County Courthouse |
| Cooke, Dr. Robert W., Medical Office |
| Cool Hollow Home |
| Cove Point Lighthouse |
| Cox-Budlong House |
| Cox, Mary Etta, House |
| Crawford House |
| Cromwell Manor |
Data from United States Park Service and Wikidata
