KD
- Christian Democrats (Finland)
- Christian Democrats (Sweden)
- Dissociation constant
- Gene knockdown
- Heaven Hill
- K-Dee
- K-d tree
- K.D. (film)
- K?d
- KD Avia
- KD Station
- KD Transportation Group
- Kadee
- Kalstar Aviation
- Kappa Delta
- Katamari Damacy
- Kawasaki disease
- Kaydee
- Kaydee (disambiguation)
- Kendell Airlines
- Keolis Downer
- Kevin Durant
- Khaki drill
- Kienböck's disease
- Kill–death ratio
- Kings Dominion
- Knock-down kit
- Koleje Dolnośląskie
- Kraft Dinner
- Krisdayanti
- Kuldeep Yadav
- Kuwaiti dinar
- Kyndryl
- Köln-Düsseldorfer
- Royal Malaysian Navy
- Toyota KD Engine
- Wasp dope