Census.gov won't help you, but the Association of Religion Data Archives will provide the missing religious statistics, with very nice color-coded maps, broken down to the county level). It will also provide mundane demographic information in exactly the same graphic format, which facilitates the identification of correlations. Sadly, the data is getting a bit long in the tooth (it dates back to 2000), but it's still pretty spiffy.
![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
Here are some statistics... knock yourself out