- Indian River Medical Center
- Indian Valley Hospital
- Indiana Association of County Councils
- Indiana Association of Plumbing and Heating Cooling Contractors
- Indiana Constructors, Inc.
- Indiana Council of Community Mental Health Centers Inc
- Indiana Donor Network
- Indiana Hospital Association
- Indiana Primary Health Care Association
- Indiana Protection and Advocacy Service
- Indiana Regional Medical Center
- Indiana University Medical Center
- Indiana University of Pennsylvania
- Indianapolis Chamber of Commerce
- Indianapolis Convention and Visitors Association
- Indianapolis-Castleton - Fairfield Inn by Marriott
- Indianapolis-College Park - Fairfield Inn by Marriott
- Indo-American Community Federation
- Indu and Raj Soin Medical Center
- Industrial Bank N.A.
- Industrial Telecommunications Associations, Inc.
- Industrial TurnAround Corporation
- Indy Parks and Recreation AARP)
- Infineon Technologies
- Infinite Legacy
- Informatics Corporation
- Information and Computing Services
- Information Inc.
- Information Resources Management College
- Information Sciences Corporation, Office of Early Childhood Development
- Information Systems Services
- Information Technology E-Commerce, Commercial Contracting Center ITECH)
- InfoUSA
- ING Financial Advisers
- Ingersoll-Rand
- Ingles Markets Incorporated
- Ingleside Presbyterian Retirement Community
- Ingraham Manor
- Ingram Entertainment
- Ingram Micro, Inc
- Injection Technology Corporation-ITECH
- Inland Empire United Way
- Inland Empire United Way, Desert Communities Region
- Inland Hospital
- Inland Valley Medical Center
- Inmate Calling IC Solutions
- Inn at Rancho Santa Fe
- Innovative Consumers Insurance Services, LLC
- Innovative Designs
- Innovative Health Strategies