Reddit is an interesting corner of the internet. The college football section (/r/CFB) is consistently filled with awesome stuff, and is often the source of whatever college football related jokes and memes hit your social media timeline of choice.
This off-season two users (cinciforthewin and bakonydraco) took a survey, resulting in 3462 votes for 156 teams, and used respondent location to map out each fan base geographically. That's not a huge response (3 percent of their users), and you can see the raw data here. A lot of the lesser populated counties only had one vote, or maybe a small handful of votes, so small sampling bias is definitely an issue they tried to account for.
