The Dayton Gems were a Tier II junior ice hockey team that played in the North American Hockey League (NAHL).
The Dayton Gems were one of six expansion franchises added to the NAHL in 2003 alongside eight clubs that joined due to the merger with the America West Hockey League. Dayton ended up getting lost in the shuffle and ran into problems part way through the year. After just 21 games, the team suspended operations when they lost access to their home arena. After forfeiting three subsequent games the club withdrew from the league and was formally dissolved.