All - Constructed - 1900–1909
| Barbeau House |
| Barber Dam and Lumber Mill |
| Barber, James, House |
| Barber, John R., House |
| Barbour County Courthouse |
| Barker Dam |
| Barker, S. B., Building |
| Bark Street School |
| Barlow House |
| Barnes, Charles, House |
| Barnwell, Arthur, House |
| Barteau Bridge |
| Bartlett, George A., House |
| Baskin Building |
| Baskin, William, House |
| Bass Mansion |
| Battle Creek Post Office |
| Baxter High School |
| Bazoon, William Lee and Eudora Courtney, Farmstead |
| Beacon Street Firehouse |
| Beale Street Historic District |
| Bean, Daniel V., House |
| Bear Lake Club, Ltd. Clubhouse |
| Beatrice City Library |
| Beatty-Corbett House |
| Beaver Opera House |
| Becker Lumber and Manufacturing Company |
| Beckett, William S. and Mary, House |
| Beckner House |
| Bedford Town Hall |
| Beech, Thomas and Jane, House |
| Beechwood Elementary School |
| Beeson Bridge |
| Bekkedal Leaf Tobacco Warehouse |
| Belleview Baptist Church |
| Bellevue High School |
| Bellevue Range Rear Light Station |
| Bellevue Stratford Hotel |
| Bellmont Hotel |
| Belmont, Perry, House |
| Belnord Apartments |
| Bemidji Carnegie Library |
| Bentley, L.B., General Merchandise |
| Berdan Building |
| Bergman, August H., House |
| Bernard, L.J. Hardware Store |
| Bernd, William J., House |
| Berry Schools |
| Berthusen Barn and Privy |
| Bertram Hall at Radcliffe College |
| Bethel African Methodist Episcopal Church |
| Beth Israel Synagogue |
| Beulah Lodge |
| Bigelow School |
| Big Falls Inn |
| Big Rocky Fork Bridge |
| Big Timber Town Hall |
| Bijou Theatre Building |
| Billingsley, Benjamin F., House |
| Black, Alfred L., House |
| Blackfoot I.O.O.F. Hall |
| Black Watch Library |
| Blakey, Albert Gallatin, House |
| Blessed Trinity Roman Catholic Church Buildings |
| Blood, Oliver, House |
| Bloom Township High School |
| Blue Hills Headquarters |
| Blum House |
| Blythewood |
| B. Mifflin Hood Brick Company Building |
| Boathouse on the Lullwater of the Lake in Prospect Park |
| Bode-Stewart House |
| Bogalusa Railroad Station |
| Bohrnstedt, John, House |
| Boise High School Campus |
| Bolens, Harry W., House |
| Bolivia Road Bridge |
| Bolton, James H., House |
| Bona Allen Shoe and Horse Collar Factory |
| Bond Building |
| Bon Ton House |
| Boone Tavern Hotel |
| Booth Cooperage |
| Booth, Frank, House |
| Booth, John E., House |
| Borgerding, Christopher, House |
| Boston Edison Electric Illuminating Company |
| Boston Edison Power Station |
| Boston Store |
| Boston Transit Commission Building |
| Boutin, Frank, Jr., House |
| Bowman House |
| Boxwood Cemetery |
| Boyden Block |
| Boylan Heights |
| Boys and Girls Library |
| Bradford, A. S., House |
| Bradford Hotel |
| Bradley, Harold C., House |
| Bradshaw Town Hall |
Data from United States Park Service and Wikidata
