| CTAA | California Talent Agencies Act 
| Others |
| CTAA | Canadian Technical Asphalt Association
| Others |
| CTAA | Cass Tech Alumni Association (Cass Technical High School; Detroit, MI)
| Others |
| CTAA | Cataract, Anterior Polar
| Others |
| CTAA | Chesterfield Township Athletic Association
| Others |
| CTAA | Chinese Taipei Athletics Association
| Others |
| CTAA | Chinese Taipei Automobile Association
| Others |
| CTAA | Colegio Territorial de Arquitectos de Alicante (Spanish: Territorial College of Architects of Alicante)
| Others |
| CTAA | Community Transport Association of America
| Others |
| CTAA | Community Transportation Association of America
| Others |
| CTAA | Council Of Turkic American Associations
| Others |
| CTAA | Cranberry Township Athletic Association
| Others |