- Bigelow, John M. (John Milton), 1804-18781
- Bodley, Rachel L.1
- Botanico-Medical College of Ohio.1
- Brinkerhoff, A. W. (Alexander W.), -1887, author1
- Brush, Edmund Cone, 1852-1930, author1
- Bunts, Alexander T. (Alexander Taylor), 1897-1972, author1
- Butterfield, John, 1817-18491
- Carroll, Thos. (Thomas), 1795-18711
- Cassels, J. Lang (John Lang), 1802-1
- Cincinnati (Ohio). Water Supply Commission.1
- Cincinnati College. Medical Department1
- Cincinnati Medical Association (Founded 1821)1
- Cloud, J. A., 1842-1
- Coleman, N. R. (Nathaniel Rannells), -19111
- Conklin, W. J. (William Judkins), 1844-1916, author1
- Cornwell, Henry G., author1
- Crile General Hospital (Cleveland, Ohio), author, issuing body.1
- Crile, George Washington, 1864-19431
- Crothers, T. D. (Thomas Davison), 1842-1918 author1
- Culbertson, H. (Howard), 1828-18901