D
- D C United
- D Generation (musician)
- D&G (designer)
- D*Face
- D-A-S-H
- D-Link (Corporate)
- D-Link (India)
- D.R. Horton, Inc.
- D.S. Kulkarni Developers
- D12 (musician)
- D2 (hotel chain)
- D3 Publisher
- Dabur India
- Dade Behring Holdings, Inc
- Dadrawala Papers
- Daejan Holding
- Daewoo
- Daewoo Motors (India)
- Daga Leasing & Finance
- Dagenham & Redbridge FC
- Dagger Forst
- Dagger-Forst Tools
- Dahyabhai Sons
- Dahyabhai Sons Ltd
- Dai-Ichi Karkaria
- Dai-ichi Mutual Life
- Daihatsu
- Daiichi Sankyo
- Daikaffil Chemicals India
- Dail Eireann
- Daily Kos
- Daily Mail and General Trust
- Daily Pilot
- Daily Racing Form
- Daily Variety
- Daimh (musician)
- Daimler
- DaimlerChrysler
- Dainippon Sumitomo Pharma
- Dairy Crest Group
- Dairy Management
- Dairyfield (Company)
- Daisy Systems
- Daiwa Securities
- Daks by Giles Deacon (designer)
- Daktronics, Inc.
- Dala (musician)
- Dalal Street Investments
- Dale Bhagwagar Media Group
- Dale Warland Singers
- Dalek
- Dalit Mazdoor Kisan Party
- Dallara Honda
- Dallas Banjo Band
- Dallas City Council
- Dallas County commissioners
- Dallas County Constables
- Dallas Cowboys
- Dallas Independent School District
- Dallas Mavericks
- Dallas Opera
- Dallas Police Department
- Dallas Stars
- Dallas Symphony Orchestra
- Dallas Zoo
- Dallas-Fort Worth International Airport
- Dalmia Cement
- Dalmia Industries
- Dalton School
- Damageplan (musician)
- Damania Capital Markets
- Damania Pharma
- Damir Doma
- Damnations TX (musician)
- Damodar Threads
- Dan Bern (musician)
- Dan Witz
- Dana International
- Dana Petroleum
- Dana-Farber Cancer Institute
- Danaher Corporation
- Danang (designer)
- Dance Magazine
- Dance New Amsterdam
- Dance Theater of Harlem
- Dance Theater Workshop
- DanceBrazil
- DandH Welding Electrodes (India)
- Dangerman (musician)
- Daniel Johnston (musician)