Cwa or CWA may be:
- Cwa people, non-Mbuti Pygmies of the Democratic Republic of the Congo
- Cwa or Cfa, Köppen climate classification for humid subtropical climates with monsoonal influences (hot, humid, rainy summers and mild to warm, dry winters)
- США, the acronym for the United States of America in Cyrillic
Acronyms and abbreviations include:
- Canadian Workroom Association – association of drapery/soft home accessory professionals
- Cape Wind Associates – offshore wind farm in Massachusetts
- Catch Wrestling Association – German professional wrestling promotion
- CEN Workshop Agreement – reference document from the European Committee for Standardization
- Central Wisconsin Airport – IATA code
- Chemical weapon agent
- Child Workers in Asia – non-profit organization defending children's rights
- Cheeseheads with Attitude - Stevie Rachelle's parody musical group from Wisconsin
- Civil Works Administration – New Deal era agency in the United States
- Clean Water Act – an environmental law in the United States
- Closed World Assumption – formalisms of knowledge representation
- College of West Anglia – a college in Norfolk
- Communications Workers of America – labor union
- Concerned Women for America – conservative Christian lobbying group in the United States
- Conference on World Affairs – at University of Colorado, Boulder
- Continental Wrestling Association – based in Memphis, Tennessee
- Country Women's Association – Australian Rural Women's Group
- Crime Writers' Association – British organization