April 20, 2006
This is an interesting map that I came across just a few minutes ago (the map is part of a Daily Kos diary, "So...where are all the Jews?". This map shows, on a county-by-county basis, where the American Muslim population is located as a percentage of the total resident population of the U.S. The data comes from the 2000 census. There are some fairly large populations of Muslims in places where I would expect (Michigan, Metro NY and DC), and a few where I wouldn't have expected (NW Ohio, NE Oregon (?), and two counties in New Mexico (??)). Also nice to see is that there is at least one county in every state that is shaded yellow (0.1 to 0.7% of the population), even in the upper mid-west and Alaska, where you wouldn't necessarily expect to find large numbers of Muslims. Of course, we have a long way to go before the map starts turning more yellow or, insha'allah, orange or brown.
For a listing of all the various maps for different religions practiced throughout the US, see here.