What is the Jewish population in Wyoming?

According to Ira M. Sheskin and Arnold Dashefsky, "Jewish Population of the United States, 2006," in the American Jewish Year Book 2006, 480 or 0.1% for the entire state.

According to a Nov 2008 NPR segment there are about 500living in the Jackson area year-round.

Considering that Jackson has two temples and the cities far from Jackson--Casper, Cheyenne and Laramie--have one each the 480 figure seems off.