- Butler, Benjamin F. (Benjamin Franklin), 1818-1893, author1
- Butler, F. W. (Frederick W.), author1
- Butler, Hiram E. (Hiram Erastus), 1841-1916, author1
- Butler, Samuel Worcester, 1823-1874, compiler1
- Butrica, Barbara A., author1
- Butsch, Winfield L., 1906-1989, author1
- Butt, Newbern I. (Newbern Isaac), author1
- Butterfield, Daniel, 1831-19011
- Bühler, Hans Adolf, 1877-1951, artist1
- Cahagnet, Louis Alphonse, 1809-18851
- Cain, Wm. (William), 1847-1930, author1
- Caldwell, John J. (John Jabez), 1836-18781
- California Medical Association, author.1
- California. Commissioner in Lunacy.1
- California. Department of Public Health, author.1
- Calkins, Alonzo.1
- Calmette, A. (Albert), 1863-1933, author1
- Calvert, George Henry, 1803-18891
- Cambridge Sanitary Society.1
- Camden District Medical Society.1