Last month we published The Upshot’s map of college football fandom, showing where people root for what college teams. That map offers great detail about what teams college football fans root for in a given location, but nothing about how concentrated college football fans are in that place.
Here, we are looking at another question: not which teams fans root for, but the proportion of the population in various places who are fans of any college football team.
A Map of Baseball Nation
Facebook fans by ZIP code
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An artist-geologist renders the history of the Earth with maps.