CASA may stand for:
Aviation
- Civil Aviation Safety Authority, the Australian aviation authority
- Construcciones Aeronáuticas SA - Spanish aircraft manufacturer
Stones
- Collect A Stone Archieve
Health
- CASA (antigen) acts as a tumor marker of the ovary
- Center on Addiction and Substance Abuse
- "Computer Assisted Semen Analysis", a technique used to automate some measurements taken as part of semen analysis
- Canadian Agriculture Safety Association
Other
- Canadian Alliance of Student Associations
- Canadian Architecture Students Association
- Capital Area School for the Arts
- Center for Adaptive Systems Applications (CASA)
- Common Authentication Service Adapter
- Computational auditory scene analysis
- Collaborative Adaptive Sensing of the Atmosphere
- Casa, an album by Mexican band Natalia Lafourcade
- Casa Italiana (Nazareth College)
Other languages
- House or dwelling (from Italian, Portuguese, Romanian and Spanish casa)
- short for casa particular, a type of bed and breakfast in Cuba
