James H. Donnewald (January 29, 1925 – September 18, 2009) was an American politician from the state of Illinois. He was a Democrat who served as state Treasurer from 1983 until 1987. Donnewald was born in 1925 in Carlyle, Illinois. A lawyer by profession, he graduated from the Lincoln College of Law, Springfield, Illinois in 1949 and was admitted to the bar in 1951. In 1948, Donnewald was elected as a Democratic precinct committeeman. He was elected as a Carlyle Township Supervisor in 1949 where he would serve until 1951.