Organizers
- Cortlandt Softball Little League
- Corvallis Environmental Center
- Cory Lidle Foundation
- Cosumnes River College Sports Camps
- Coto de Caza Golf Club
- Cotswold Running LTD
- Cottage Grove Recreation Department.
- Cottonwood Golf Course-John Klein, PGA
- Cottonwood Hills Golf Course
- Cottonwood School
- Cougar Aquatic Team -NJ
- Cougar Soccer Academy
- Cougar Soccer Camp
- Coughlin Chevrolet of Pataskala
- Coulee Region Tennis Association
- Council Bluffs Soccer Club
- Council Rock
- Council Rock Basketball
- Council Rock Swimming
- Counseling Psychology Student Government
- Count Basie Center for the Arts
- Count Basie Theatre
- Country Club at Woodloch Springs
- Country Club of Brewton
- Country Club of Halifax
- Country Club of Hilton Head
- Country Club of Maryland
- Country Club of New Bedford
- Country Club of Roswell
- Country Coast Classic Inc
- Country Drives Golf Center
- Countryside Christian School
- Countryside Country Club
- County Commissioners of Kent County, MD
- County Community Projects
- County For A Cure
- County Line Baptist Church
- County of Alameda
- County of Allegheny Parks
- County of Franklin Parks & Recreation
- County of Santa Barbara
- Courage Worldwide, Inc.
- Courageous Community Services
- Court Care for the Pikes Peak Region
- Court One Athletic Club
- Court One Athletic Clubs North
- Court One Athletic North Ahtletic Club
- Court Think, LLC
- Courtenay Blue Devils
- Courts Plus Community Fitness
