9. Illinois
30% of the population is Catholic.
SikhfaithHindumuslimchurchJewishIllinoisreligionOrthodoxNew YorkBuddhistatheistsWisconsinChristianSlideshowCaliforniacathedralsNew JerseyNew MexicoProtestantConnecticutRhode IslandPennsylvanianon-religousChristianityMassachusettsList XFinancemost Catholic states in the USwidely practiced religions in the worldwhat religion is most popular in the worldWhat's "the most Catholic" state in the US?What states in the US are the most religious?How many Catholic cathedrals are there in the US?Most Religious Countries in the World Keeping the FaithStates in the US that have biggest percentage of CatholicsHow many Catholics there are in the entire world? Percentage of the CatholicsShow more...Show less