The 2008–09 Florida State Seminoles men's basketball team represented Florida State University in the 2008–2009 NCAA Division I basketball season.

The Seminoles were coached by Leonard Hamilton and played their home games at the Donald L. Tucker Center in Tallahassee, Florida.

The Seminoles were a member of the Atlantic Coast Conference.

They lost in the quarterfinals of the 2009 ACC men's basketball tournament.

They received and at–large bid to the 2009 NCAA Division I men's basketball tournament, earning the No.