Idaho - Significance region: Local
| Abbs, Walter, House |
| Adams, Abram A., House |
| Ada Odd Fellows Temple |
| A. F. R. Building |
| Aiken's Hotel |
| Ake, F. P., Building |
| Albaugh, Eleanor, Cabin |
| Albion Methodist Church |
| Allred, Ezra, Bungalow |
| Allred, Ezra, Cottage |
| Allsup, Marion, House |
| Allton Building |
| Alvis, James, House |
| American Falls Archeological District |
| American Legion Cabin |
| American Legion Hall |
| American Legion Malad Post 65 |
| Amustutz Apartments |
| Anasola, Jose and Gertrude, House |
| Anderson-Elwell House |
| Arambarri, Galo, Boarding House |
| Arco Baptist Community Church |
| Arctic Point Fire Lookout |
| Art Troutner Houses Historic District |
| Ashley, Dr. George, House |
| Ashley, George, Sr., House |
| Asposas, James, House |
| Athay, Sam, House |
| Atlanta Ranger Station Historic District |
| Baker, James V. and Sophia, House |
| Bank of Juliaetta |
| Barnes, Tom, Barn |
| Bate, S. A., Barn and Chicken House |
| Baugh, W. H., House |
| Bayview School II |
| Beale, F. F., House |
| Bear Lake County Courthouse |
| Bear Lake Market |
| Beck, Albert, House |
| Beck Barns and Automobile Storage |
| Beckman, Andrew and Johanna M., Farm |
| Beckman, Oscar and Christina, Farmstead |
| Bellevue Historic District |
| Bellgrove School II |
| Bell, R.H. and Jessie, House |
| Bernd, W. A., Building |
| Berriochoa, Ignacio, Farm |
| Bethany Deaconess Hospital |
| Bethel Baptist Church |
| Bethune-Ayres House |
| Bickel School |
| Big Cedar School |
| Big Creek Commissary |
| Big Falls Inn |
| Bishop West Barn |
| Blaine County Courthouse |
| Blatchley Hall |
| Blessing, Carl, Outbuildings |
| Board-and-Batten Commercial Building |
| Boarding House |
| Bohman, Axel, House |
| Bohman, Ole, House |
| Boise City-Silver City Road-Fick Property Segment |
| Boise High School Campus |
| Bonneville County Courthouse |
| Bonneville Hotel |
| Booth, Frank, House |
| Bothwell, James, Water Tank House |
| Boulevard Mo-tel |
| Boussuet, Birdie, Farm |
| Bovill Opera House |
| Bower, Charles, House |
| Bowlby, T. P., Barn |
| Braddock Gold Mining and Milling Company Log Building and Forge Ruins |
| Breier Building |
| Brick, Frank J., House |
| Bridwell, James F., House |
| Brookover, J. Gordon and Barbara J., House |
| Brose, Robert and Augusta, Ranch |
| Browning Block |
| Brown's Creek CCC Camp Barracks |
| Bruneau Episcopal Church |
| Brunzell House |
| Bryant, H. H., Garage |
| Budge Cottage |
| Budge, Julia, House |
| Budge, Taft, Bungalow |
| Buhl City Hall |
| Buhl IOOF Building |
| Building at 247 Pleasant Avenue |
| Burnett, H. C., House |
| Bushnell-Fisher House |
| Buster Meat Market |
| Butterfield Livestock Company House |
| Butts Point Creek Fire Lookout |
| Bux's Place |
| Byrne, Tom, House |
| Cabin Creek Ranch |
| Caldwell Carnegie Library |
| Caldwell Historic District |
Data from United States Park Service and Wikidata
