Many public schools heavily favor in state residents (Ex: TX, CA), though some are a bit more OOS friendly (Ex: WVU, UVM). Check MSAR to confirm.
I don’t know of other schools that officially have a regional bias, except for somewhere like WashU with WWAMI.
Aside from this, I’ve heard anecdotal evidence that some schools may somewhat favor applicants from the same region, as those people might be more likely to matriculate. However, I wouldn’t rely on this to get you into an OOS public school.
Some schools have a profile on their website with info about the previous matriculating class, and sometimes this includes the states where students were from. You could try to check that for the schools you are interested in to see if a high number of OOS admissions were from surrounding states.