One of the things I miss from Reddit is the various regional/state/etc level communities for discussing things that affect your geographic area.
So, to help counter that, I created the /c/northdakota@lemmy.world community to discuss the goings-on within the state of North Dakota. It is currently devoid of people, as one might expect for a geographically-large but population-tiny state.
However, what might be more useful for you is this list of communities that I've put together of all US state/territory/district level communities that I am currently aware of. I plan to keep that list fairly updated for awhile, so if there's a missing community, do let me know.