Organizers
- Colchester Parks & Recreation
- Colchester Parks and Recreation
- Coldwater Canada
- Coldwater Canada - CAD
- Coldwater Foundation for Leadership and Community Development
- Coldwater Little League
- Coldwater On-the-Run
- Coldwater Recreation
- Coldwood School Run
- Cole Humphrey
- Colemanstown 10k
- Coles County Council on Aging LifeSpan Center
- Coles Little League
- Coleville High School Boosters
- Colgate University Men's Soccer Camps
- Colicchio Basketball
- Collaborative Autism Partnerships at Veva Blunt
- Colleen Urbaniuk
- College Camp Tours
- College Connection & 3STEP Sports LLC
- College Development Camp
- College Glen Little League
- College of Business- Garrett A. Morgan Summer Business Institute
- College of DuPage
- College of Marin Sports Camps
- College of Staten Island
- College Options Foundation
- College Park Athletic Club
- College Scouting Bureau
- College Soccer Academy
- College Soccer ID Academy
- Collegebound 4 Kids
- CollegeSwimming Enterprises
- Collegiate Soccer Academy
- Colleton County Rice Festival
- Colleton River Golf Academy
- Colleyville Parks and Recreation Department
- COLLIER COUNTY
- Collindale Golf Academy
- Collingswood Youth Football
- Collins Hill Golf Club
- Collins Maxwell Baxter Soccer Club
- Collinsville Police Department Special Olympics
- Colombia Tri Events LLC
- Colombianitos
- Colon Cancer Alliance
- Colon Cancer Coalition
- Colonia Girls Softball League & Central Jersey Cyclones
- Colonial Acres Golf Club
- Colonial Heights Park and Recreation
