Research Institute Finds 11 of America's Least Religious Cities

#1. Portland, Oregon (tied for first): 37 percent

#1. San Francisco, California (tied for first): 37 percent

#10. Detroit, Michigan (tied for tenth): 25 percent

#1. Seattle, Washington (tied for first): 37 percent

#4. Denver, Colorado (tied for fourth): 29 percent

#4. Las Vegas, Nevada (tied for fourth): 29 percent

#6. Minneapolis/St. Paul, Minnesota: 28 percent

#7. Columbus, Ohio: 27 percent

#8. Boston, Massachusetts (tied for eighth): 26 percent

#8. Washington, DC (tied for eighth): 26 percent

#10. Cincinnati, Ohio (tied for tenth): 25 percent