Leon Grochowski (11 October 1886 – 17 July 1969) was the second Presiding Bishop of the Polish National Catholic Church in the United States, Canada and Poland and early American radio evangelist.

[4] Upon reaching America he continued his studies in engineering which he started in Germany but became interested in the Polish National Catholic Church (PNCC) movement.

During that time Grochowski organized clothing and food aid programs to Poland in the aftermath of World War II, called the Good Samaritans.

As a result, Grochowski also was awarded the Bojownikom Niepodleglosci, (Knight's Cross of the Order of Polonia Restituta), by the post-war government of Poland, the Polish People's Republic.

[8] His body is entombed in the "Monument of Gratitude" Mausoleum in St. Stanislaus Cathedral Cemetery, Scranton, Pennsylvania, where he rests with the PNCC's First Presiding Bishop, Bp.