Michael Wiwchar CSsR (born May 9, 1932) is a Canadian-born bishop of the Catholic Church in the United States and Canada.

[1] Pope John Paul II named Wiwchar as the eparch of St. Nicholas of Chicago on July 2, 1993.

The principal co-consecrators were Archbishop Michael Bzdel and Bishop Innocent Lotocky, Emeritus Eparch of St. Nicholas of Chicago.

A month later on December 9 he was appointed as the Apostolic Administrator of St. Nicholas of Chicago, a position he held until March 25, 2003.

Wiwchar served in Saskatoon until his resignation was accepted by Pope Benedict XVI on May 2, 2008.