John Austrheim (10 October 1912 – 13 April 1995) was a Norwegian politician, farmer for the Centre Party.
In 1967 he was elected leader of the Centre Party, a position he took over after Per Borten, who was serving as Prime Minister at the time.
He was elected to the Norwegian Parliament from Østfold in 1961, and was re-elected on three occasions.
Borten's Cabinet resigned in 1971, but when the Centre Party returned to power on 18 October 1972, Austrheim was appointed Minister of Transport and Communications in the new cabinet of Lars Korvald.
During his time in cabinet he was replaced in the Norwegian Parliament by Ambjørg Sælthun and, briefly, Leiv Erdal.