The 2008–09 Cornell Big Red men's basketball team represented Cornell University in the 2008–09 college basketball season.

This was coach Steve Donahue's 8th season at Cornell.

The Big Red compete in the Ivy League and played their home games at Newman Arena.

They went 11–3 in Ivy League play to win the championship and received the league's automatic bid to the 2009 NCAA Division I men's basketball tournament.

3 seed Missouri in the first round[1] to finish their season at 21–10.