- Hurstbourne Hotel at Louisville Conference Center
- Hussey Copper
- Hutchinson County United Way
- Hutchinson Medical Center
- Hutchinson Regional Medical Center
- Hyatt
- Hyatt Corporation
- Hyatt Orlando
- Hyatt Regency Birmingham - The Wynfrey Hotel
- Hyatt Regency Cincinnati
- Hyatt Regency Kauai
- Hyatt Regency Phoenix
- Hyatt Resorts Caribbean
- Hyde Leadership Public Charter School
- Hydrologic Monitoring LP
- Hylton Adamson Watson
- HyOx Medical Treatment Center
- Hyundai
- Hyway Trucking
- I Still Can Mentorship, INC
- I.C. System
- i3 Research
- IADT
- Iballot.com
- Iberia Medical Center
- Iberia Tiles
- Iberville Parish Council
- IBEW Local 1919 - Journeyman Tree Trimmers
- IBF Group
- IBM
- IcanSaveLives.org, Inc.
- ICAT Expo
- ICG Communications
- ICMA
- Icon Health and Fitness, Inc.
- Iconographic Designs
- Idaho County
- Idaho County District Court
- Idaho State University
- Ideal Software, Inc.
- Ideal Steel and Builders Supply, Inc.
- IEPMPG - International Entertainment Production and Meeting Presentation Group
- IFMC-Encompass
- IG Sun Financial Services, Inc
- iGate Corporation
- Ignite Resources Center
- IHC
- IIAM
- IKM Inc.
- Ikon Office Solutions