Outside the Bible belt too; the fundamentalist Mormons in Utah, Arizona, Nevada, Colorado, and New Mexico also have child brides, but I think they're more reprehensible since they also expel their teenage boys by abandoning them in Phoenix, Salt Lake City, Denver, Albuquerque, and Las Vegas to a life of destitution due to being uneducated and sheltered their entire lives in cult like conditions.

They also have complete control of the towns they inhabit including the police and judiciary to shield them from state efforts to stop them; with Colorado City being the most egregious example imo.