I live smack dab in the middle of white-bread USA. I live in one of those gated country club subdivisions. Its huge - something like 17 miles of streets. Mostly professionals. Lots of nouveau riche white trash that think their new Escalade makes them better than you.
If I had to guess, I'd say its probably 95%+ white back here. As for the suburb I live in, probably about 75%. Because this is a suburb of New Orleans ( a predominantly Catholic city) I'd guess that most people are Catholic here as well. I know at least 5 houses on my street are, including my own.