- Denver Botanic Gardens
- Denver Convention Complex
- Denver Health Medical Center
- Denver International Airport
- Denver Metro Building Owners and Managers Association
- Denver Metro Convention and Visitors Bureau
- Department of Defense Education Activity
- Department of Energy
- Department of Energy - Hanford
- Department of Energy, Chicago Operations Office
- Department of Health and Human Services
- Department of Health and Human Services, NIH-NCI
- Department of Society and Rehabilitation Services
- Department of State
- Department of the Interior Minerals Mgmt Service
- Department of the Navy
- Department of Veteran Affairs Medical Clinic
- Department of Veterans Affair
- Department of Veterans Affairs VA Learning University
- Department of Workforce Services - Crest Center
- Department of Workforce Services - Roosevelt, Utah
- Department of Workforce Services - Salt Lake City
- Department of Workforce Services - Taylorsville
- DePaul Community Health Services - Gould
- DePaul University
- Dept of Workforce Services - Ogden
- DeQuincy Memorial Hospital
- DermResearch, Inc.
- Des Moines Asphalt and Paving
- Des Moines Water Works
- Deschutes United Way
- Deseret Management Corp.
- Desert Extrusion
- Desert Lawn Funeral Home
- Desert Memorial Cremation & Burial
- Desert Morning News
- Desert Regional Medical Center
- Desert Springs Hospital Medical Center
- Desert Valley Hospital
- Desert View Hospital
- Design Data Systems, Inc.
- Design Purchase Link
- Designingevents
- Desktop Solutions, Inc.
- Desmone and Associates
- DeSoto County
- DeSoto Memorial Hospital
- Destination Ann Arbor
- Destination Hotels and Resorts
- Destination Irvine