predominantly Islamist communities Closest I could find for US Muslim adherents per 100,000 people Muslims in U.S. - June 2012 HuffingtonPost Muslims in U.S. - June 2012 HuffingtonPost this site researchers find 317 people who practice Islam per 100,000 in Minnesota Montana predominantly Islamist communities concentrations of muzlims pretty low percentage of Muslim residents 0.034 Montanans identify Montana growing reported huffingtonpost.com