Organizers
- Challenge Fitness
- Challenge Fitness Tennis
- Challenge Nation
- Challenge Taiwan
- Challenger Center
- Challenger Learning Center
- Challenger Productions and Ramm Sports LLC
- Challenger Sports
- Chamber of Commerce
- Chamber of Commerce of Eastern CT
- Chamber of Commerce of Greater Cape May
- Chambers Bay Golf Course
- Chambersburg Memorial YMCA
- Chambersburg YMCA
- Chamblee Middle School Education Foundation
- Champ Camp
- Champ Camp LLC
- Champagne Runch
- Champaign County Farm Bureau Foundation
- Champaign Park District
- Champion Summer Camp
- Champion Volleyball
- Championchip Ireland
- Champions Club Basketball
- Champions Club Sports
- Champions Events
- Champions Fitness Club
- Champions Hockey Academy Inc.
- Champions of Wickenburg Youth
- Champions Pointe Golf Club
- Championship Fastpitch
- Championship Racing.com
- Champlain Islands Parent Child Center
- Chandler Hill Challenge
- Chandler National Little League
- Chandler preparatory Academy
- Chandler Youth Football Pop Warner
- Channel Islands YMCA
- Chapel Grove Baptist Church
- Chapel Hill Christian School
- Chapel Hill Quest Martial Arts LLC
- Chapel Lane Presbyterian Church
- Chapel To Church Half Marathon
- Character Counts Kent County
- Character Counts Mid Shore, Inc
- Characters for a Cause
- Chardonnay Golf Club
- Char-Em ISD
- Chariot Run Golf Club
- Charis Camp & Conference Centre
