An interesting analysis of each team's ticket sales and where these sales take place.
It maps out the counties where sold.
https://projects.fivethirtyeight.com/col...ket-sales/
I checked Notre Dame, and this is what it said:
"Among Vivid Seats’ buyers, the nationwide fan base that Notre Dame loves to promote holds up. The Fighting Irish are the most popular ticket in 171 of these counties, by far the most in college football, leading Georgia’s 142. After Notre Dame, the next four teams are all large state schools that, for the most part (apologies to Georgia Tech and Vanderbilt), have a stronghold on the state’s football fans: Georgia, Tennessee, Missouri and Nebraska.
Notre Dame also leads the country with at least some ticket buyers in 1,614 different counties, from Penobscot County in Maine to the Kenai Peninsula Borough in Alaska. The college football bluebloods all have a wide presence here: Notre Dame is followed by Alabama, Tennessee, Michigan and Ohio State.
A few major areas with no college football power are split between fan bases. Notre Dame sells the most tickets on Vivid Seats in New York County (16 percent), followed by Michigan (7.9 percent) and Penn State (5.5). Northwestern, which advertises itself as “Chicago’s Big Ten Team” but often welcomes hordes of opposing fans into Ryan Field, is the top seller in Illinois’s Cook County, followed by Notre Dame and Michigan. USC outdraws UCLA in Los Angeles County, 30.4 percent to 19.6 percent.
The dominant local fan bases are also clear: West Virginia leads in every county in its state, and Wisconsin is the top seller in every Wisconsin county in which anyone bought a Vivid Seats ticket."