http://www.huffingtonpost.com/stephen-mansfield/the-mormonizing-of-americ_b_2083125.html?utm_hp_ref=email_share
Looking at the photo list at the bottom, the state ranking of Mormons per 100,000 people has:
PAC-12 Country
5. Arizona (6,147 per 100k)
9. Washington (3,975 per)
10. Oregon (3,862 per)
12. Colorado (2,833 per)
13. California (2,050 per)
Big 12 Country
16. Kansas (1,198 per)
17. Texas (1,178 per)
18. Oklahoma (1,147 per)
23. West Virginia (902 per)
25. Iowa (808 per)
Big Ten Country
14. Nebraska (1,281 per)
29. Maryland (738 per)
36. Indiana (637 per)
39. Minnesota (577 per)
41. Ohio (508 per)
42. Illinois (435 per)
43. Wisconsin (431 per)
44. Michigan (428 per)
46. New York (403 per)
47. Pennsylvania (392 per)