Bas may refer to:
People
- Bas (name), a given name and a surname
- Bas (rapper) (born 1987)
Chemistry
- Boron arsenide (BAs), a chemical compound
- Barium sulfide (BaS), a chemical compound
Other uses
- bas (French for "low"), as in bas-relief sculpture
- Tamburica, a stringed instrument sometimes known as bas
- BAS (accounting), the Swedish accounting principles and chart of accounts
See also
- BAS (disambiguation)
- Bass (disambiguation)