About half of voters identified themselves as born-again or evangelical Christians, and they favored Romney by about a 9-to-1 margin. Romney was also the favorite among voters who said they attend religious services at least once a week and those who attend occasionally.
Education didn't make much difference in how Alabamians voted. More than 60 percent of those with high school educations and more than 60 percent of those with college degrees supported Romney. The two candidates were closer among those with post-graduate educations.
Voters in Alabama, which hasn't gone Democratic in a presidential race since 1976, indicated they had made up their minds long before the candidates bombarded them with TV ads. About eight of 10 said they did so before September.
Democrats overwhelmingly voted for Obama and Republicans for Romney. Among voters who identified themselves as independents, Romney won about three-fourths of the vote.
The exit poll of 1020 voters was conducted for AP and the television networks by Edison Research in a random sample of 15 precincts statewide. Results were subject to sampling error of plus or minus 4 percentage points; it is higher for subgroups.