Maximilian Andreas Ehmer (born 3 February 1992) is a German professional footballer who plays as a defender for Gillingham.
A product of Queens Park Rangers' youth academy, Ehmer signed his first professional contract at the age of 17 in 2009. Two years later, in January 2011, he joined League One team Yeovil Town on loan on a deal that would ultimately run for the remainder of the 2010–11 season. He returned to Yeovil on a six-month loan deal for the following season, and ended the campaign on loan at another League One club in the form of Preston North End. In August 2012, Ehmer signed a new three-year deal at QPR. In March 2013, he was loaned out, this time joining Stevenage on loan until the end of the 2012–13 season.
On 28 September 2013, Ehmer made his QPR debut after four years at the club, coming on as a 78th-minute substitute for the injured Clint Hill, in a 2–0 league win against Middlesbrough at Loftus Road.