What's interesting to me is the somewhat consistent contrarian vote in many of the districts. In Columbus, fair number of Michigan fans. In Ann Arbor, fair number of Ohio State fans. In Knoxville, fair number of Florida fans, etc. These are the folks who just hate their neighbors. "Hello neighbor! Who do you root for?" "Anyone who is playing you."

Also curious how this research was done. My old home turf shows to be 52% Ohio State fans. I did not have that feeling growing up there.

It's based on Facebook likes.

The analysis is very very cool. However, it is definitely flawed. Not only is it 5+ years old...It being derived from facebook likes is far from a perfect methodology. Some team fb pages are super interactive and a fun follow...others are dead. Also some fan bases are more likely to be into facebook than others. I would say these numbers would slant higher to the elite programs with a whole department running their facebook page. If you went door to door, I think mid-major programs like Ohio would have higher numbers than this analysis.

Sidebar...I was shocked to see Wisconsin owns the twin cities area and the eastern half of Minnesota.

It is easy to explain Oregon's presence in many strange areas. Oregon was very successful from 2008-14, and played in a couple of National Championship Games (2010, 2014). They were perceived as an outsider. People love underdogs. This chart is from they year of one of their appearances in the National Championship Game, and it isn't a current chart. In the years from 2016-8 they were not as good, plus they are not really as much of an "outsider" anymore.

And to take it a step further, I'd bet the current map would show much more Clemson penetration that before particularly in the SE. Regardless, it's an interesting set of data points.