Organizers
- Cherry Point Youth Sports
- Chesapeake Bay Sports Camps
- Chesapeake Parks, Recreation and Tourism
- Chess Tutors After School Programs
- Chess Tutors Grand Match Gala
- Chessmates
- Chesterfield County Parks and Recreation
- Chesterfield County Public Schools Adult Continuing Education
- Chicago Multi-Cultural Dance Center
- Chicago School of Musical Arts
- Chicago White Sox
- Chicago Youth Symphony Orchestras
- Chico State Athletics
- Children's Chorus of Maryland
- Children's Museum of the Lowcountry
- Children's Theater of Madison
- Children's Theatre of Elgin
- Children's Voice Inc.
- Child's Play NY
- Chilliwack Stingrays_BCSSA
- China Lake Camp
- Chino Hills Pony Baseball
- Chop's Teen Club
- Chris Sailer Kicking
- Christian Bikers Charities
- Church of The City
- Churchill School & Center
- Churchill Summer Camps
- Churchville Recreation Council Inc
- Cincinnati Children's Hospital Medical Center
- Circle A Ranch
- City and County of Denver
- City Ballet San Francisco
- City Hoops Inc
- City of Antioch Recreation Department
- City of Arvada
- City of Atlanta Department of Parks, Recreation, and Cultural Affairs
- City of Auburn Tennis
- City of Beaver Dam Recreation Department
- City of Bell
- City of Bellaire
- City of Belleville
- City of Benton
- City of Bentonville
- CITY OF BETTENDORF
- City of Bowie
- CITY OF BRISBANE
- City of Brush
- City of Cape Girardeau
- City of Casa Grande
