The religious composition of the 20 largest counties in the United States.

This is the religious composition of the 20 largest counties in the United States.

Catholicism is the largest in fifteen of them.

Clearly, Texas cities are outliers here with high concentrations of evangelicals. pic.twitter.com/omLCEw2zq6

— Ryan Burge 📊 (@ryanburge) May 15, 2026