Leo John Steck (August 30, 1898 – June 19, 1950) was a bishop of the Catholic Church in the United States.
He was engaged in pastoral work as a priest and served as the director of the Catholic Rural Life Conference.
He also wrote a leaflet, A Foreign Mission Close to Home, that appealed for financial support for the Salt Lake diocese The Mormons misunderstood its intent a considered it a call for the conversion of the members of the Church of Jesus Christ of Latter-day Saints.
Salt Lake's bishop, Duane G. Hunt, had to reassure the Mormons of their true intent.
[1] Bishop Steck had health problems and when he was in his native Missouri suffered a stroke.