NFL team fan bases: geography vs. reality

The black lines indicate the territories each team would claim if everyone just cheered for the closest team.

Hover over a region to see the counties in which that team is actually the most popular team by number of Facebook likes.

Click on a region to keep it highlighted. Click again to un-highlight it. Use the links in the lower-left corner to highlight an entire division.

Thanks to Sean Taylor and the Facebook Data science team for the fan data. Read their post here

Scroll down to read some observations . Territority maps for the NBA, MLB, NHL, and MLS are available here