- Identity Toys, Inc. (Milwaukee, WI)1
- Imperial Glass Corporation1
- Inge, M. Thomas1
- Ingham, William Herbert, 1947-1
- Ingleside Book Club (Morgantown, WV)1
- Institute for the History of Technology and Industrial Archaeology2
- Interfaith Council of Greater Richmond1
- International Association for Identification1
- International Black Photographers1
- Irby, General Richard1
- Irby, Richard L. (Richard Logan), 1918-20022
- Ironmonger, Elizabeth Lindsay Hogg, 1891-19851
- Isaac, Rhys1
- It's Wheeling Steel (Radio program)1
- Iversen, Eve1