Ignatius Mrak (October 16, 1810 – January 2, 1901) was a Slovenian-born American prelate of the Catholic Church who served as Bishop of Sault Saint Marie and Marquette from 1869 to 1879.

[1] After passing a rigorous state examination, he was appointed a tutor to the son of Baron Peter Pirquet in Legnago, near Verona, where he remained for two years.

Influenced by the missionary work of his fellow Slovene, Frederic Baraga, Mrak sought admission to the Diocese of Detroit and arrived in the United States in October 1845.

Mrak quickly learned the Ottawa dialect and, one month after arriving in America, preached an entire sermon in that language.

[4] After suffering an attack of rheumatism, Mrak submitted his resignation as bishop of Sault Saint Marie and Marquette to the pope.

[6] His health turned for the better and he served at parishes in Negaunee and Menominee before resuming his missionary work, accepting a post in Peshawbestown.