John Mary Joseph Benedict Chanche, S.S., was an American prelate of the Roman Catholic Church. He served as the first bishop Diocese of Natchez in Mississippi from 1841 to 1852.

The Diocese of Jackson is a Latin Church diocese in Mississippi in the United States. Its ecclesiastical jurisdiction includes the northern and central parts of the state, an area of 97,458 square kilometers (37,629 sq mi). It is the largest diocese, by area, east of the Mississippi River.