or even mid-sized cities probably know and see fans from nearly all the NFL teams.
I know fans of many teams, but not all... maybe not even close to all. I just met the first Washington fan I've ever known 'around here' in my life... well, when I say 'met' I know who he is thru an acquaintance and he lives nearby - 15 miles away.
After the Niners and Raiders, (obviously, from my location), I'd guess the next most popular team around me are the Rams, though they are few... then the Chargers, even fewer, and then it gets difficult to determine. Probably the Steelers. Surprisingly not many Cowboys fans... off the top of my head I know maybe 3?
Everybody seems to like GB... but true GB fans? I don't know many at all.. maybe a couple.