I was able to pretty easily find a whole article inside of about 30 seconds done by Pew Research, showing regional clustering and distribution, and they moreover describe the methodology and data sources used.

So while I get what you’re saying and why you’re asking, I’d encourage you to just spend a minute on a few web searches, instead of trying to treat the lemmy user base as a ChatGPT instance. And that last bit is why I’m not just handing you the link, or the answer.

You shouldn’t generally accept LLM answers as correct and authoritative, especially if it’s not a topic you have any knowledge on - corroboration is always a good idea.