Carlton Johnson was also sentenced Monday to 5-15 years for inappropriately touching a third girl.
Johnson had been bishop of Faith Congregational Church of God in Christ in Muskegon. A jury found him guilty last month of two counts of first-degree criminal sexual conduct and one count of second-degree criminal sexual conduct.
Court testimony showed the sexual assaults occurred between 2006 and 2012 when the girls were age 15 and younger.
About six other women have testified that they were victimized years earlier. A 70-year-old woman testified that she was sexually assaulted by Johnson as long ago as 1957.