These are the most Catholic cities:
Three U.S. cities tie for most Catholic, with 36 percent of their residents claiming allegiance to the church.
New analysis from the the Public Religion Research Institute ranks the largest religious groups in 30 major U.S. metropolitan areas. Catholics and the religiously unaffiliated vie for biggest faith-related population in many of cities, with Protestants coming closesly behind.
Check out the cities with the largest Catholic populations:
1 Boston, Massachusetts
2 New York, New York
3 Pittsburgh, Pennsylvania