The 1984–85 Michigan State Spartans men's basketball team represented Michigan State University in the 1984–85 NCAA Division I men's basketball season. The team played their home games at Jenison Field House in East Lansing, Michigan and were members of the Big Ten Conference. They were coached by Jud Heathcote in his ninth year at Michigan State. The Spartans finished with a record of 19–10, 10–8 in Big Ten play to finish in fifth place. They received an at-large bid to the NCAA Tournament as a No. 10 seed and lost to Alabama-Birmingham in the First Round.