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- Cal Rep (Long Beach, California)
- California Shakespeare Theater (Berkeley, California)
- California Theatre Center (Sunnyvale, California)
- Cape Cod Theatre Project (Falmouth, Massachusetts)
- Capital Repertory Theatre (Albany, New York)
- Castillo Theatre (New York)
- Center for New Theater at Cal Arts (Valencia, California)
- Center for Puppetry Arts (Atlanta, Georgia)
- Center Theatre Group (Los Angeles, California)
- Centerstage (Baltimore, Maryland)
- Centre Stage, Greenville's Professional Theater (Greenville, South Carolina)
- Charleston Stage Company (Charleston, South Carolina)
- Cherry Lane Theatre (New York)
- Chicago Dramatists (Chicago, Illinois)
- Chicago Shakespeare Theater (Chicago, Illinois)
- Children's Theatre Company (Minneapolis, Minnesota)
- Childsplay Inc (Tempe, Arizona)
- The Cider Mill Playhouse (Endicott, New York)
- Cincinnati Shakespeare Company (Cincinnati, Ohio)
- City Garage (Santa Monica, California)
- City Theatre (Miami, Florida)
- City Theatre Company (Pittsburgh, Pennsylvania)
- The Civilians (New York)
- Clarence Brown Theatre Company (Knoxville, Tennessee)
- Classic Stage Company (New York)
- Classical Theatre of Harlem (New York)
- The Cleveland Play House (Cleveland, Ohio)
- Cleveland Public Theatre (Cleveland, Ohio)
- Collaboraction (Chicago, Illinois)
- Colony Theatre Company (Burbank, California)
- Columbus Children's Theatre (Columbus, Ohio)
- Commonweal Theatre Company (Lanesboro, Minnesota)
- Company Of Fools (Hailey, Idaho)
- Congo Square Theatre (Chicago, Illinois)
- Connecticut Repertory Theatre (Storrs, Connecticut)
- Contemporary American Theater Festival (Shepherdstown, West Virginia)
- Cornerstone Theater Company (Los Angeles, California)
- The Coterie Theatre (Kansas City, Missouri)
- Court Theatre (Chicago, Illinois)
- Creede Repertory Theatre (Creede, Colorado)
- Curious Theatre Company (Denver, Colorado)
- Cyrano's Theatre Company (Anchorage, AK)
Read more about this topic: List Of Theatre Communications Group Member Theatres