Organizers
- 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
- Christian Heritage Academy
- Christian Homeschool Formal of Austin
- Christian Life Center
- Christian Team Ministries Inc
- Christian Women's Job Corps
- Christian youth camp
- Christie Rampone Girl's Soccer Camp
- Christie Rampone Girl's Soccer Camps
- Christmas Without Cancer
- Christy Mathewson Little League
- CHS Athletic Boosters
- CHS Performing Arts Boosters
- CHS Turkey Chase 7k
- Chuck Corica Golf Complex
- Chuck Ford Baseball Inc
- Chuck Pacholkiw Memorial Scholarship
- Chuck Will Golf Academy at Dulles Golf Center
- Chucktown Kids Fitness
- Chucktown Kids Tri
- Chula Vista American Little League
- Church at Polaris
- Church Missions Network
- Church of Celebration Metro
- Church of The City
- Church of the Epiphany
- Church of The Good Shepherd
- Church of the Redeemer
- Church Run Tennis & Swim Club
- Church World Services
- Churchill County Parks and Recreation
- Churchill School & Center
- Churchill Summer Camps
- Churchville Nature Center
- Churchville Recreation Council Inc
- Ciaovelo
- Ciclismo Volpi
- Cider Ridge Golf Club
- CIGEO Tennis Association
- CIGEO Tennis Association
- Cimarron Hills Golf $ Country Club
- Cinch Sew
- Cincinnati Children's Hospital