The Hon Mr Justice Michael John Hartmann GBS (traditional Chinese: ???) is a Hong Kong retired judge who served in the Court of Appeal of the High Court of the territory, and as a local non-permanent judge in the territory's highest court, the Court of Final Appeal.
He was born in Bombay (now Mumbai), British India on 24 July 1944 and raised in Rhodesia (now Zimbabwe).
He received an LLB from the University of London through the University College of Rhodesia in 1967.
He was an attorney in Rhodesia from 1971 until moving to Hong Kong to join the Legal Department in 1983.
He left the government and was appointed a judge in the District Court in 1991.