KDA, or similar, may refer to:
Businesses and organisations
Government and politics
- Kollam Development Authority, India
- Kachin Defense Army, Myanmar
- Karachi Development Authority, Pakistan
- Khulna Development Authority, Bangladesh
- Combat Groups of the Working Class (; KdA), East Germany
Military
- Kongsberg Defence & Aerospace, a Norwegian weapons supplier
- General Sir John Kotelawala Defence University (informally Kotelawala Defence Academy), Sri Lanka
Other organisations
- Kentucky Distillers' Association, an American trade group
- Kennedy's Disease Association, an American medical charity
Music
- KDA (DJ), an English house DJ
- K/DA, a virtual K-pop group
Other uses
- Kilodalton (kDa), 1000 unified atomic mass units
- Worimi language, spoken in NSW, Australia (ISO 639-3:<code>kda</code>)
- Kills, deaths, and assists, a score-tracking concept in certain video games