Organizers
- International Corporate Health Invasion
- International Foundation for CDKL5 Research
- International Game Fish Association, Inc.
- International Hockey Camps
- International Ice Hockey Systems Inc.
- International Montessori School
- International Music Camp
- International Preschools
- International School Los Angeles
- International School of Boston
- International School of Brooklyn
- International School of Los Angeles
- International School of Orange County
- International Squash Academy
- International Surf Festival
- Interquest Exports and Imports Inc
- InterVarsity's Graduate & Faculty Ministries
- Into the Wild OC Trail Runs
- Intonation Music
- Intonation Music Workshop
- Intown Neighbors
- Intrepid Adventures
- Intrepid Events
- Intrigue Dance and Performing Arts Center
- Inventive Ones S.T.E.M. (Science, Technology, Engineering and Mathematics)
- Inverness Club
- InvictaEastKent_CTUK
- Involved Events
- InYou Ministries
- iO Theater
- iO West
- iO West Theater
- Ionad Mara agus Goeltai Acla Teo
- Ionian Village
- Iowa Army National Guard
- Iowa City Boys Baseball
- Iowa City Parks and Recreation Department
- Iowa City Senior Center
- Iowa City/Johnson County Senior Center
- Iowa Football
- Iowa Football Club
- Iowa Multisport
- Iowa State Delta Chi
- Iowa USSSA
- Iowa Weimaraner Rescue
- iPlayTek
- iPrint 3D Studio
- IQ Village Franchise
- Ira Kramer Golf Academy
- iRecreate
