Luke Patrick Reilly (born November 23, 1995) is an American-born Canadian medley swimmer.

He was born in Dallas, Texas, and raised in Richmond, British Columbia.

Although he missed the Swimming Canada imposed cut by 0.03, he met the Olympic requirements and won the 400 m by 4 seconds.

Despite having a back injury, Luke competed in the 29th Summer Universiade in Taipei City in August 2017, where he took part in both the 400 m individual medley and 200 m individual medley, being eliminated in the heats with a time of 4:24.51 and the semifinals with a time of 2:03.44 respectively.

He competed at the 2014 Commonwealth Games and finished seventh in the 400 m individual medley and eighth in the same event at the 2014 Pan Pacific Swimming Championships.