Group
- North Star Games 1
- Northern Ohio Wargaming Society11
- Northern Virginia Gamers (NOVAG)25
- Nothing Ventured Games7
- Novus Ordo Seclorum79
- OMGames LLC3
- Oathbreaker Games4
- Ohio Men of the Red Chest24
- Old Heroes Never Die3
- On The Lamb Games5
- One World By Night1
- One World by Night1
- Onyx Path Publishing76
- Orc Stomp2
- Order of the Amber Die1
- Orion Township Public Library & Lake Orion High School1
- Orion Township Public Library / Gina Bucalo-Crowther1
- Ottawa Red Shirts57
- Overworld Games13
- Ozarks RISING33