- IOUs
- -ious
- Iowa
- Iowa Central Community College
- Iowa City
- Iowa Lakes Community College-Estherville
- Iowa Lakes Community College-South
- Iowa River
- Iowas
- Iowa State University
- Iowa Wesleyan College
- Iowa Western Community College
- Iowa Western Community College-Clarinda
- Ioway
- IP
- IPA
- IPAs
- Ipatieff
- ipecac
- ipecacs
- ipecacuanha
- Iphigenia
- ipm
- IPM
- IPO