The 2009–10 Florida State Seminoles men's basketball team represented Florida State University in the 2009–2010 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 2010 ACC men's basketball tournament.

They received and at–large bid to the 2010 NCAA Division I men's basketball tournament, earning a 9 seed in the West Region, where they lost to 8 seed Gonzaga in the first round.