NFL Nations: The Most Popular NFL Teams in the World
Maps Mania: The NFL Maps of the United States
File:Map of Cities in the USA and Canada with MLB, MLS, NBA, NFL
MasterPieces Sports Puzzle - All Teams 500 Piece
Are Marlins really the most popular Florida sports team? Of course
MAP: the Most Popular NFL Team in Every State
The Geography of NFL Fandom - The Atlantic
Twitter map: NFL teams more popular than NBA clubs in most states
Ranking the most popular NFL teams by state