Gallup: “New Hampshire is the least religious state in the U.S., edging out Vermont in Gallup’s 2015 state-by-state analysis. Mississippi has extended its eight-year streak as the most religious state, followed closely by neighboring Alabama.”
“Religion today is significantly linked to politics in the U.S., with Republicans, on average, significantly more religious than Democrats, so it could be expected that more religious states would be more Republican.”
“However, there are exceptions to this pattern. Louisiana, Georgia, North Carolina and Kentucky are among the most religious states but are classified as politically competitive based on their party identification. Alaska, as another example, is one of the least religious states in the union, but is classified as solid Republican. And, as the most outstanding example of a disjuncture between religiousness and partisanship, New Hampshire is the least religious state in the union, yet is classified as a lean Republican state by Gallup and as a swing state by observers.”