Robert Otto Ashbach (July 18, 1916 – October 23, 1990) was an American politician, businessman, and farmer.
Ashbach lived with his wife and family in Arden Hills, Minnesota.
He served on the Arden Hills City Council from 1950 and then served as mayor of Arden Hills from 1952 to 1963.
Ashbach also served on the school board in 1985 and was a Republican.
Ashbach died in a hospital in Saint Paul, Minnesota after undergoing open heart surgery.