James Henry Muirhead AC KStJ QC (24 April 1925 – 20 July 1999) was an Administrator of the Northern Territory and a Judge of the Supreme Court of the Northern Territory.
Muirhead was born in Adelaide and was educated at St Peter's College and the University of Adelaide. After completing high school he enlisted in the Second Australian Imperial Forces for service in the Second World War. From 1943 - 1946 he served as an infantryman and signaller with the 57/60 Battalion in Bougainville and later with the 32/52 Battalion in Rabaul, New Britain.
He obtained a Bachelor of Laws from the University of Adelaide and was admitted to the South Australian Bar in 1950. He practised as a barrister and solicitor in the firm of Thomson & Co until 1970 when he was appointed as a Judge of the Local and District Criminal Court of South Australia. He was appointed as a Queen's Counsel in 1967. Current Judge Dean Mildren was his Articled Clerk from 1966 - 1968.