Look up deca in Wiktionary, the free dictionary.
Deca, Decas or DECA may refer to:
- Deca-, a metric prefix
- Nandrolone, the active ingredient in the steroid Deca-Durabolin, commonly referred to as Deca
- Decabromodiphenyl ether, an organic compound
- Deca-press, Moldavian news agency
- Deca (journalism collective), a journalism cooperative
- Deca i Sunce (Children and the Sun), album by the Serbian hip-hop artist Marčelo
- Deca Sports, sports video game series for the Wii
- Decas (album), compilation album by the American metal band As I Lay Dying
- DECA Games, video game company