For my part of the country, Upstate New York, Catholicism takes the place that evangelical Christianity holds in the Bible Belt. The region experienced heavy immigration from Italy, Ireland, Poland and what was Bavaria at the time (southern Germany). You’ll hear Catholic radio stations, encounter EWTN on the basic cable tier (and channel 10 in Buffalo), and see local diocese news on the front page of local newspapers. You may be asked about why your forehead is clean on Ash Wednesday, and why there’s meat on your dinner plate on Friday.
The region is politically quite liberal, but socially conservative; an odd mix not often encountered outside of the Rust Belt. Surprisingly, there was general support for SSM in UNY, but abortion remains a hot-button issue, especially in Buffalo.
Buffalo is probably the most traditionally and seriously Catholic of all Upstate regions. Buffalo is the second most Catholic city in the United States, and the percentage of Catholics in Buffalo is higher than Mormons in Salt Lake City. (Cite: The Association of Religion Data Archives.) Catholicism is embedded in the area’s culture in a way that is very similar to what one might see in Italy or Mexico. For example, this being summertime, it’s lawn fete season, a uniquely Buffalonian phenomenon.
There is the assumption that everybody is Catholic, so you may get asked “What parish do you belong to?”, or given advice like "Just say a few decades"or “You should pray to St. Anthony for that.” If you say you’re not Catholic, it’s usually no big deal; no invites to church, no pamphlets, no condemnations to Hell. I attended a very long, very Catholic (but also very beautiful) funeral in Buffalo on Saturday, and nobody shot me dirty looks for not kneeling before I slid into my pew, not doing signs of the cross, remaining silent during prayers to Jesus and Mary, and the like. There’s not the judgmental mindset as what might be encountered with evangelical Christianity in the South. Nobody tries to convert or save you, although they may disapprove of you dating their daughter.
There aren’t many Protestants in the Buffalo area, but what’s there are mostly mainstream congregations; Episcopalians, Lutherans, Presbyterians, Methodists, Northern Baptists, and the like. Except for the Lutherans (more heavily oriented towards Missouri Synod than ELCA), they tend to have a more liberal, less evangelical slant. Southern-style Bible thumping is frowned upon. Buffalo has a Jewish population of about 25,000; it’s said to double during the academic year. Intermarriage is much higher than among Jews outside of the area, and synagogue membership is lower. There’s a growing Muslim and Hindu population, thanks to immigration and the presence of the area’s many colleges and universities.
Where I live now, in “the most enlightened town in America”, most people aren’t very religious. Atheists, agnostics, and barely practicing Christians and Jews predominate. The most visible religion seems to be Buddhism, followed by New Age/woo practices.