- Chalfont St Peter AFC
- Charlton Rovers AFC
- Cheltenham Civil Service
- Cheltenham Cricket Club
- Cheltenham Cricket Club Ladies
- Cheltenham Saracens
- Cheltenham Town Ladies FC
- Cheltenham Town Ladies Youth FC
- Chesterton AFC
- Chipping Campden School
- Chobham Academy
- Chosen Hill School
- Christ's College Finchley
- Churchdown Panthers FC
- Cinderford Town Youth FC
- Cotswold Gymnastics Club
- CPD Iau Bryn Rhosyr
- CPD Mynydd Llandegai
- CPD Mynydd Tigers
- Cranleigh FC
- Digitech Studio School
- Drakes Broughton Rangers FC
- Drove Primary School
- Dunstable Town FC
- Dursley Town FC
- Dursley Town Girls FC
