The survey finds that income level and religious convictions were bigger factors than race or age. Sixty-three percent of those making less than $40,000 a year voted for the ban, as did 85 percent of evangelical Christians.
Among other religious groups, 66 percent of Protestants supported the ban, plus 60 percent of Roman Catholics.
The poll found that 56 percent of voters over age 55 cast ballots to forbid gay marriage, and 57 percent of nonwhite voters.
But the director of the survey says at no point before or after the election did a majority of Californians say they support gay marriage. He thinks voters will remain deeply divided until public opinion shifts.