The following 480 biographies were extracted from the Illustrated History of the State of Idaho and represent the leading men of Idaho at the turn of the 20th Century.
- Abernathy, Henry H.
- Acker, James S.
- Adams, Dave
- Adams, Peter
- Ailshie, James F.
- Ainslie, George
- Ake, Franklin P.
- Alexander, Joseph
- Alexander, Moses
- Allison, William B.
- Anderson, Andrew B.
- Anderson, James H.
- Anderson, Louis N. B.
- Anderson, Robert J.
- Andrews, De Forest H. Hon.
- Angel, Texas
- Armstrong, Charles D.
- Arnold, Willis
- Averitt, Philetus Hon.
- Baird, Ezra
- Baker, William A.
- Ballantine, James W.
- Ballard, Ernest L.
- Barrett, John S. Hon.
- Barton, E. M.
- Barton, Robert H.
- Baugh, William H., M.D.
- Baughman, Ephraim W.
- Baxter, James
- Bean, James H., M. D.
- Beck, Peter S., M. D.
- Benedict, Samuel G.
- Bennett, Benjamin
- Bennett, Richard H.
- Berg, Abel A.
- Berry, R. W.
- Berryman, Charles W.
- Bibby, Samuel E., M. D.
- Bigham, Samuel W.
- Bingman, John J.
- Blatchley, Henry D.
- Bledsoe, Relf
- Bomberg, Charles
- Borah, William E.
- Brady, John C.
- Brearley, Lucinda J. Mrs.
- Briggs, Burdice J. Hon.
- Brigham, John W.
- Britt, Richard H.
- Brocke, Nicholas
- Brodbeck, John
- Brooks, Clarence W.
- Brown, Charles F.
- Brown, Jonas W.
- Brown, Newell Jonathan M. D.
- Brown, William M., M. D.
- Bruce, George W.
- Bruner, Presley M.
- Brunzell, Oscar F.
- Buchanan, William N.
- Buckle, Joseph
- Buckley, Edmund
- Budge, Alfred
- Budge, William Bishop
- Buhl, Nelson
- Buller, R. F.
- Burgoyne, Edward
- Burns, Carter W.
- Burns, W. F.
- Burr, Charles F.
- Bush, James H.
