Twitter's NFL fan map shows you where teams' fans are located
NFL Fan Map: Favorite Team by County
Ticket sales data show 49ers fan cluster above Arctic Circle
Liga MX: Map locations & stadiums of every team in Mexico's top division
Who is Really America's Team? – The Harvard Sports Analysis Collective
Facebook showcases NFL fandom across the U.S.
Amazing Maps of the Sports World
Amazing Maps of the Sports World
ABC 33/40 High School Football Previews: Several teams set sights on blue map in wide-open 1A
Football supporter map of London
Interactive map breaks down the most popular CFB teams by zip code - Footballscoop
Texas, Florida, Ohio State: Facebook map of college football fan bases.