|Relatives:||Elaine Grasso (wife), Donny Grasso (son)|
|Voiced by:||Charlie Rocket|
Don Grasso was Donny Grasso's father.
Don was a hard working, blue collar citizen, but he was also an abusive and unloving husband and father. He did not get along at all with his son, Donny, who took his father's lack of love hard and turned to crime because of it. The more times the police escorted Donny home, the more Don hated him. After Donny finally ran away, all Don could do was express his happiness that his son was gone. Even a few months after, Don's attitude had not changed at all. When Terry McGinnis and Maxine Gibson went to the Grassos' house to ask about Donny, Don angrily ordered them out and requested that they remind Donny not to return home if they ever saw him.