Nationally, Latter-day Saints account for about 2 percent of the adult populace, according to the survey.
Protestants lead the way at nearly 51 percent, followed by Catholics at 24 percent.
Like Mormons, Jewish Americans make up about 2 percent of the U. S. population, but, unlike Mormons, they are spread more evenly. The most Jewish state is New York at 7 percent, followed by New Jersey, 5 percent, and Massachusetts and the District of Columbia, 4 percent.
Other notable poll findings:
• Utah is the least Protestant state with 11 percent of its residents identifying with one of those denominations.
• The top 10 Protestant states are all in the South, led by Mississippi and Alabama at 77 percent.
• Rhode Island tops the Catholic list at 54 percent, followed by New Jersey (44 percent), Massachusetts (41 percent), Connecticut (40 percent) and New York (37 percent).
• Not surprisingly, the least Catholic states are in the South. Only 8 percent of residents in Mississippi, Alabama, Tennessee and Arkansas call themselves Catholics.
• Utah, with all of its Mormons, also ranks among the least Catholic states. About 9 percent of Utahns belong to the world's largest Christian faith.
The survey's margins of error range from plus or minus 1 percentage point nationally to as much as 6 percentage points in some state samplings.
A previously released Gallup poll crowned Mississippi as the nation's most religious state, edging out Utah by 1 percentage point.