- Calthwaite JFC
- Campbeltown Pupils AFC
- Cardigan RFC
- Caterham FC
- Chalfont St Peter AFC
- Charlton Rovers AFC
- Chase Side Youth FC
- Cheltenham & Cotswold Advanced Motorcyclists
- Cheltenham Chargers Basketball Club
- Cheltenham Junior Hockey Club
- Cheltenham Phoenix Aquatics Club
- Cheltenham Saracens FC
- Cheltenham Spa Women FC
- Cheltenham Swimming and Water Polo Club
- Cheltenham Tigers FC
- Cheltenham YMCA Basketball Club
- Chiltern & South Bucks District
- Cholsey United FC
- Chosen Hill Former Pupils RFC Mini's & Juniors
- Chosen Hill Former Pupils RFC Seniors
- Churchdown Male Voice Choir
- Churchdown Panthers FC
- City of Gloucester WFC
- Civil Service FC
- Cleevonians FC
- Cobras Rugby
- Cotswold Gymnastics Club
- Cranbrook Juniors FC
- Cranleigh FC
- Dancestars Gloucester
- Deer Park Rangers FC
- DH Coaching
- Dover Athletic FC Youth
- Dover Rangers FC
- Dronfield FC
- Dursley Town Girls AFC
- Dursley Town Girls Coaches