John Stephen Bazin (October 15, 1796–April 23, 1848) was the third Roman Catholic Bishop of Vincennes (now the Archdiocese of Indianapolis).

[1] In November 1830, he arrived in the United States and began his labours among the Roman Catholics of Mobile, Alabama, where for seventeen years he worked for the religious instruction of the young, organizing the Sunday schools and establishing the Catholic Orphan Asylum Society.

[1] In 1846 at the request of Bishop Michael Portier, Bazin went to France to secure the services of the Society of Jesus for Spring Hill College of Mobile, Alabama, and of the Brothers of the Christian Schools for the Boys' Orphan Asylum.

[1] When Célestine Guynemer de la Hailandière, Bishop of Vincennes, resigned his see in 1847, Bazin was consecrated his successor on the 24th of October of that year.

[2] In a letter to another bishop, Jean-Baptiste Bouvier of Le Mans, Guerin described Bazin as "pious, humble, and of an amiable simplicity.