Here is a comprehensive summary of the 2025 Ohio State Buckeyes football season:

The 2025 Ohio State Buckeyes, led by seventh-year head coach Ryan Day, entered the season as defending national champions but ultimately failed to repeat, falling to Miami in the Cotton Bowl Classic during the College Football Playoff quarterfinals. The team achieved a perfect 12–0 regular season—their first since 2019—defeating all three rivals, including Michigan, while never trailing in the second half and holding every opponent to 16 points or fewer, a feat not seen since the 1975 Florida Gators. They advanced to the Big Ten Championship Game for the first time since 2020, where they faced Indiana, marking a highly successful campaign despite the playoff loss. The Buckeyes shattered television records, drawing 16.1 million viewers for their opener against Texas (the most-watched Week 1 game ever), 18.4 million for the Michigan finale, and 18.3 million for the conference title game, the latter being the most-watched conference championship in college football history. Additionally, the team boasted a massive average home attendance of 104,105 at Ohio Stadium, ranking 4th nationally, and experienced significant roster turnover with 17 players leaving via the transfer portal and 10 joining. Ultimately, despite a perfect regular season and record-setting viewership, the team's title defense was cut short in the playoffs.