Organizers
- 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
- 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
- Chris Smith AllStar Classic presents the Sistrunk 5K
- Chris Young Tennis Camp
- Chrisman High School Cross Country
- Christ Academy
- Christ Church of Arlington
- Christ Community Church
- Christ Community Health Services Augusta
- Christ Episcopal School
- Christ the King Catholic Church
- Christ the King Catholic School
- Christchurch School
- Christian Bikers Charity
- Christian County Optimist Club
- Christian Golf Leadership
- Christian Golf Leadership Camp
- Christian Health Service of Syracuse, Inc.
- Christian Health Services of Syracuse