For anyone looking into this, the first sentence of https://en.wikipedia.org/wiki/Demographics_of_Utah#Religion https://en.wikipedia.org/wiki/Demographics_of_Ut

For anyone looking into this, the first sentence of https://en.wikipedia.org/wiki/Demographics_of_Utah#Religion https://en.wikipedia.org/wiki/Demographics_of_Utah#Religion literally says "A majority of the state's residents are members of The Church of Jesus Christ of Latter-day Saints (LDS Church)." The lowball estimates of 41% come from things like the following: "Professor Tim Heaton, who studies LDS demographics for church-owned Brigham Young University, says the county numbers probably come from church membership rolls, and that between half and one-third of those people are not active in the faith. If that's true, then, at most, 41.6 percent of Utahns are church-going Mormons." (2005 source http://archive.sltrib.com/story.php?ref=/ci_2886596 http://archive.sltrib.com/story.php?ref=/ci_2886596 ) It's at least slightly nontrivial to decide on the right definition, but I think church membership is a perfectly fine measurement. As such, almost every other publication and measurement supports the "obvious" claim that Utah has a Mormon majority of (60+some)% and even Salt Lake County may have a (50+epsilon)% Mormon majority. Exampe source from 2014: http://www.sltrib.com/news/1842825-155/mormon-populace-picks-up-the-pace http://www.sltrib.com/news/1842825-155/mormon-populace-picks...