Group
- Catalyst Game Labs311
- Catan Studio74
- Certifiable Studios21
- Chainmail Legion20
- Chaos Haunted & Historical Tours11
- Chaosium Inc127
- Chaotic Rogue Entertainment13
- Cheapass Games4
- Cheese Weasel Logistics1
- Chicago City Gamers1
- Chicago Dungeon Crawl82
- Chicagoland Games: Dice Dojo2
- Chip Theory Games48
- Chris Kennedy Publishing1
- Christian Gamers Guild2
- Chrysalis Creative Endeavors3
- CigarPete's Wednesday PFS3
- CinciHolo2
- Cincinnati Arsenal Gaming220
- Circle City Con1