Leo Philip Cowley (February 3, 1913 – August 18, 1973) was the Roman Catholic and the auxiliary bishop of the Roman Catholic Archdiocese of Saint Paul and Minneapolis, Minnesota. Born in Saint Paul, Minnesota, Cowley was ordained a priest for the then Saint Paul Archdiocese on June 4, 1938. On November 28, 1957, he was appointed the auxiliary bishop of the archdiocese and died while still in office.