Leon Lemmens (March 16, 1954 – June 2, 2017) was a Roman Catholic auxiliary bishop in Belgium.
Lemmens, a native of Maasmechelen, was ordained a priest on July 10, 1977.
He was named an auxiliary bishop to the Archdiocese of Mechelen-Brussel by Pope Benedict XVI on February 22, 2011 and consecrated on April 3, 2011.