There's only 200,000 in the whole country. That's a little more than Nevada and less than Washington State. Mexico has a million and a half.
https://en.wikipedia.org/wiki/The_Church_of_Jesus_Christ_of_Latter-day_Saints_membership_statistics_(Canada)
https://en.wikipedia.org/wiki/The_Church_of_Jesus_Christ_of_Latter-day_Saints_membership_statistics_(United_States)
https://en.wikipedia.org/wiki/The_Church_of_Jesus_Christ_of_Latter-day_Saints_membership_statistics(http://www.autoadmit.com/thread.php?thread_id=4449728&forum_id=2#39627162)