A new Gallup poll surveyed over 350,000 Americans to figure the relative religiosity of every state. They asked respondents, "Is religion an important part of your life?" They concluded that Mississippi is the most religious state (85% of respondents answered yes) and Vermont is the least religious state (42%).
Of course, to me, these results reaffirm previous regional stereotypes. The Bible Belt has the highest incidence of religiosity: Mississippi, Alabama (82%), South Carolina (80%), Tennessee (79%), and Louisiana and Arkansas (78%). On the other hand, states in New England and the Pacific Northwest are the least religious: Vermont, New Hampshire (46%), Maine and Massachusetts (48%), Alaska (51%) and Washington (52%).
Of note, North Carolina is the eighth most religious state (76%) and Virginia is sixteenth (68%).