Holden Greiner (born March 25, 1991) is a former professional basketball player.

He played four seasons for the Lehigh Mountain Hawks men's basketball team.

Greiner helped lead Lehigh to a berth in the College Basketball Invitational tournament.

[3] Greiner signed a training camp deal with the London Lightning of the National Basketball League of Canada (NBL) for the 2015–16 season.

He joined the team in an exhibition game against Raptors 905 of the NBA Development League on November 9, 2015.