CGA may stand for:
- California's Great America
- Central of Georgia Railway
- Centro de Gestión Avanzado (Advanced Management Centre), an organization managing the Andalusian ICT schools Network
- Certified General Accountant
- Ceylon Garrison Artillery
- Charitable Gift Annuity
- Community of the Glorious Ascension, a Christian monastic community
- Compressed Gas Association, the oldest major industrial and medical gas association in the world
- Connecticut General Assembly, the bicameral legislative body of Connecticut
- Culver Girls Academy, a college preparatory boarding school and summer camp in the United States
- United States Coast Guard Academy
Read more about CGA: Science and Technology