- Illig, John S. (John Stephens), 1825-19031
- Imboden, John D. (John Daniel), 1823-18957
- Ingles, John S. (John Stephen)1
- Irby, Richard L. (Richard Logan), 1918-20026
- Irvine, William A. (William Alexander), 1866-19231
- Irwin, Gordon C. (Gordon Cogswell)1
- Irwin, Mary Wilson1