11. Las Vegas
Percentage of Unaffiliated: 23%
Termed by some as the city of sin or the wedding capital, Las Vegas finds itself on similar ground with most cities having almost a quarter of their population unaffiliated to any religion. While a large portion of the city remains Catholic, the unaffiliated only trail behind by around 10%.
The higher percentages are yet to come. Let’s continue this list of 20 least religious cities in the United States.
