Organizers
- Children's Innovation Center
- Children's Miracle Network of Northern New York at Samaritan
- Children's Museum of Sonoma County
- Children's Museum of the Arts
- Children's Museum of the Lowcountry
- Children's Theater of Madison
- Children's Theatre of Elgin
- Children's Theatre of Winston Salem
- Children's Tumor Foundation
- Children's Voice Inc.
- Child's Play NY
- Chilimania
- Chillicothe Challenge
- Chilliwack Stingrays_BCSSA
- Chilly Chippewa 5k/1Mile Run/Walk
- China Lake Camp
- China Peak
- China Peak Mountain Resort
- Chinatown5k
- Chinese Mutual Aid Association
- Chino Hills Pony Baseball
- Chino HIlls THUNDER Baseball
- Chino Mudder
- Chino Valley YMCA
- Chino Youth Museum
- Chinook School of Music
- Chinook Winds Golf Resort
- Chippewa Falls Parks and Recreation
- Chippewa Twp Rec
- ChiRunning
- Chisago Lakes Middle School
- Chisholm Trail Ranger Tennis
- Chisholm Trail with Eagle Mountain-Saginaw ISD
- Chitresh Das Dance Company & Chhandam School of Kathak
- Chix with Stix Lax Club
- Chloe's Fight Rare Disease Foundation
- Choctaw Cheer
- Choctaw High School
- Choice Health & Fitness
- Choo Smith Youth Empowerment
- Chopping Block
- Chops
- Choreography by Rae
- Chosen
- CHOSEN Marathon
- Chris Canty Foundation
- Chris Dudley Basketball Camp
- Chris Haack Bulldog Golf Camp
- Chris Poole Volleyball Camp
- Chris Sailer Kicking
