Group
- Castle Board Game Corporation2
- Castles & Chemo5
- Catalyst Game Labs417
- Catan Studio82
- Central Indiana Enchanted Fairy Trail1
- Chainmail Legion18
- Chaos Haunted & Historical Tours9
- Chaosium Inc113
- Chaotic Stupid12
- Chapel Haven1
- Charlie D Games 2
- Charm City Game Design1
- Chess & Strategy Game Association22
- Chicago ConLARP82
- Chicago Public Library1
- Chip Theory Games36
- Chipsterzone Games2
- Christian Gamers Guild2
- Cincinnati Arsenal Gaming207
- Cincinnati arsenal gaming7