Circa may mean:

• Circa, Latin for "about".
• Circa (skateboarding) - the skateboarding industry brand name.
• CIRCA (Clandestine Insurgent Rebel Clown Army) - the antimilitarist British action group of clowns dressed in army uniforms.
• Circa - the name of a famous drinking club and burlesque lounge in San Francisco the early 1900s
• CIRCA - Popularly used to denote the computer labs at the University of Florida in the CIRCA (Center for Instructional and Research Computing Activities) department. Those who work there, called Technology Consultants or homo sapiens blueus vestus (plural form vesti), perform their toils of helping students with their computer problems.
• A record label subsidiary of Virgin Records