- Investment Management Consultants Association
- Invivo Data
- Inyo County
- Iowa Bankers Association
- Iowa City VA Health Care System
- Iowa City-Coralville Convention and Visitors Bureau
- Iowa Clinical Research Corporation
- Iowa Corn Processors
- Iowa Dental Association
- Iowa Department of Public Health, Division of Family and Community Health
- Iowa Donor Network
- Iowa Events Center
- Iowa Farm Bureau Federation
- Iowa Governor's Office
- Iowa Health Des Moines
- Iowa Health Physicians-Internal Medicine
- Iowa Health system
- Iowa Hospital Association
- Iowa Limestone Producers Association
- Iowa Methodist Kidney Transplant Center
- Iowa Methodist Medical Center
- Iowa Specialty Hospital - Belmond
- Iowa Specialty Hospital - Clarion
- Iowa State Association of Counties
- Iowa State Bank
- Iowa-Nebraska Primary Care Association
- Ipromotions
- IQ Solutions
- Irene Wortham Center
- Iron Age Corp.
- Iron County Medical Care Facility
- Iron Mountain
- Iron Mountain Secure Shredding
- Iron School District
- Iron Workers, Local 17
- Iroquois Memorial Hospital
- Iroquois-Kankakee Regional Office of Education I-KAN)
- Irving Convention and Visitors Bureau
- ISG Plate, Inc.
- ISG Solutions
- Isgrig Financial Service
- Island Press
- Island Systems-Paquito and Sons, Inc.
- Isle of Wight Co.
- Ismart LLC
- ISProductions
- It's Never 2 Late
- Italy-America Chamber of Commerce of Texas Inc.
- ITNS
- ITNS International Transplant Nurses Society)