Organizers
- Caroline County Recreation & Parks
- Caroline Dorchester County Fair
- Carpenter Nature Center
- Carpenter Race Services
- Carpet Capital Running Club
- Carr Elite
- Carr Elite Football
- Carrera Races
- Carrick on Suir AC-Roadrunners
- Carrie on 5k Memorial Run
- Carrigaline Lions Club
- Carrigaline Road Runners AC
- Carrington Tennis
- Carroll Area Swim Team
- CARROLL COUNTY LITTLE LEAGUE
- Carroll County Sports Complex
- Carroll ISD Aquatic Center
- Carroll ISD Aquatic Center - North Texas Nadadores Swim Team
- Carson City CrossFit
- Carson City Little League
- Carson City Parks & Recreation
- Carson City PWF
- Carson Tigersharks
- Carson Valley Swim Center
- Carson's Art School
- Carteret Junior Softball League inc.
- Carteret Kraze
- Carter's Run
- Carterville Lions Youth Volleyball Camp
- Carthage College
- Carthage Family Fitness
- Carthage Junction Save the Depot Project
- CARUS SPORT & EVENT SDN BHD
- Carver High School
- Carver-Plympton-Middleboro PW
- Cary Tennis Park
- Cary-Grove Youth Baseball & Softball
- Caryn's Kids Scholarship Fund
- CASA
- CASA Child Advocates of Montgomery County
- CASA Council of Mohave County
- Casa Glynn
- Casa Grande Little League
- CASA Liberty/Chambers Counties
- Casa Manana Inc
- CASA of Kern County
- CASA of Marion County
- CASA of Robertson County
- CASA of Siskiyou County
- CASA of Southeast Texas, Inc.
