All - Constructed - 1830–1839
| 2000 Block Of Eye Street, NW |
| Abrahams Farmhouse |
| Acker and Evans Law Office |
| Ackerman-Dewsnap House |
| Adams-Crocker-Fish House |
| Adams Farm |
| Adelphi School |
| Aderholdt's Mill |
| Adsit Cobblestone Farmhouse |
| Aiken, John J., House |
| Aillet House |
| Alasa Farms |
| Aldrich, Daniel, Cottage and Sawmill |
| Alexander Classical School |
| Alexandria Canal Tide Lock |
| Allegheny Portage Railroad National Historic Site |
| Allemong, Christian, House |
| Allen, Nathan, House |
| All Saints Church |
| All Saints Episcopal Church |
| Altwood |
| Alvord House |
| Amawalk Friends Meeting House |
| Amelia Island Lighthouse |
| Ames Academy Building |
| Ampthill |
| Anchuca |
| Angus Cobblestone Farmhouse and Barn Complex |
| Annandale Plantation |
| Annas Farmhouse |
| Antioch Christian Church |
| Antioch Christian Church |
| Anza House |
| Arcade Center Farm |
| Arlington Plantation |
| Armstrong, A., Farm |
| Armstrong Farm |
| Arthur Tavern |
| Ashburton House |
| Ashland Mill Tenement |
| Ashley Planes |
| Ashley-Willis House |
| Ashton-Hursh House |
| Astor Fur Warehouse |
| Austerlitz |
| Avant House |
| Averiett, Benjamin H., House |
| Badin-Roque House |
| Bailey, Frederick A., House |
| Baird Law Office |
| Baldwin, David, House |
| Balfour House |
| Baltimore City College |
| Bancroft, Joseph, House |
| Bangor House |
| Bank Of Xenia |
| Bard Infant School and St. James Chapel |
| Barnegat Lighthouse |
| Barns, Acors, House |
| Barnstable County Courthouse |
| Barry, Gov. John S., House |
| Bartow-Pell Mansion and Carriage House |
| Bates House |
| Battle-Friedman House |
| Battleground Plantation |
| Baynton, John, House |
| Bear Island Light Station |
| Beck-Warren House |
| Belvidere |
| Bennington Street Burying Ground |
| Benson-Hammond House |
| Berrien Springs Courthouse |
| Bertus-Ducatel House |
| Bethel A.M.E. Church |
| Bethel Cemetery |
| Billy Place |
| Bingham, George Caleb, House |
| Bird Homestead |
| Blackwell, Antoinette Louisa Brown, Childhood Home |
| Blaisdell, Dr. Wesely, House |
| Blaydes House |
| Bloomsburg (Watkins House) |
| Bluff Hall |
| Boatner House |
| Bobb House |
| Boler's Inn |
| Bolton Priory |
| Bonner House |
| Borodino Hall |
| Bowker Place |
| Bowne Station Road stone-arch bridge over tributary of the Alexauken Creek |
| Boyd-Harvey House |
| Bradford Center Meetinghouse |
| Bradley, Amzi, Farmstead |
| Brandenburg, Henry, House |
| Brandon Cemetery |
| Brandon Hall |
| Brandreth Pill Factory |
| Bremo Slave Chapel |
| Brick Schoolhouse |
Data from United States Park Service and Wikidata
