The NFL’s biggest fan bases were sorted out by Nielsen heading into the 2026 season, and the top of the list looks exactly like a trio of places where football isn’t just watched - it’s lived. The Buffalo Bills, Kansas City Chiefs, and Green Bay Packers came out on top in Nielsen’s Local Fandom Index, with Buffalo claiming the No. 1 spot.
Nielsen measured each team’s fan base using eight factors: apparel purchases, event attendance, linear television viewership, streaming, radio listening, betting intent, social media following, and general interest. The Bills finished with a score of 208, the only group to crack 200.
That kind of support tracks with what Buffalo has been under Sean McDermott and Josh Allen over the past seven years. The Bills have finished first in the AFC East in five of those seasons, and even when they haven’t been on top, they’ve still reached the Divisional Round or better every year since 2020.
Bills fans also bring a flavor all their own. The tailgate scene has its own rituals, from table-breaking to bowling ball shots to Pinto Ron getting hit with condiments outside Highmark Stadium. Even Jason Kelce got a taste of that culture.
Jason Kelce at the Bills tailgate. 🤣
(🎥: @newheightshow) pic.twitter.com/5vSXQeUH2W
- theScore (@theScore) January 21, 2024
Kansas City followed right behind at No. 2 with a score of 194. The Chiefs’ fan base has been fed by the Patrick Mahomes-Travis Kelce-Andy Reid era, and the results speak for themselves: three Super Bowl wins since 2018 and five trips to the big game.
The crowd in Kansas City has also built a reputation of its own. In 2013, Chiefs fans produced a roar measured at 142.2 decibels, and in 2017 they set the record for the largest grilling lesson, led by Smithfield Fresh Pork at their NFL Draft Party.
The fan culture has stayed loud, welcoming, and unmistakably tied to the team’s rise. And with Taylor Swift in the mix, the support for Kelce and Mahomes has reached far beyond Kansas City.
142.2 = Decibels the @Chiefs ' Arrowhead Stadium reached at it's loudest last year!
More #OAKvsKC stats before #TNF: https://t.co/gjfzCrGOvC pic.twitter.com/hH3Pd2Zv6P
- The Checkdown (@thecheckdown) December 9, 2016
Green Bay checked in third at 172, and that number fits a franchise where the community and the team are welded together. Whether it was Brett Hundley, Aaron Rodgers, or Jordan Love at quarterback, Packers fans have shown up.
The fan-owned structure, the cheeseheads, and the fact that tailgating dates back to 1919 all feed into the identity. This is the standard-bearer for old-school football fandom.
The Packers’ last Super Bowl title came in 2010, but that hasn’t dulled the devotion one bit. Lambeau Field in winter is part of the brand, and Packers fans have no problem showing up with shovels when snow piles up. That kind of loyalty has kept Green Bay near the top of any conversation about fan culture.
The rest of Nielsen’s rankings brought a few surprises. Boston, home of the New England Patriots, landed at No. 21 with a score of 107. New York, represented by the Jets and Giants, finished last at 85.
The message from the rankings is pretty clear: fan culture matters. It can lift stadium noise, fill local businesses on game day, and help keep stars bought in even when things get messy.
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