John Angus MacLean (May 15, 1914_2000) was a Prince Edward Island politician and farmer. After leaving the farm to fight in World War II, Maclean returned to the island and ran for a seat in the Canadian House of Commons as a Progressive Conservative but was defeated in the 1945 and 1948 federal elections. He was first elected to Parliament in the 1951 election and held his seat continuously until he left federal politics in 1976. MacLean served in the cabinet of Prime Minister John George Diefenbaker as Minister of Fisheries from 1957 until the government's defeat in the 1963 Canadian election.

In 1976, MacLean was persuaded to leave federal politics and take the leadership of the Prince Edward Island Progressive Conservative Party which had languished in opposition for a decade. MacLean led the party to victory in 1979 and formed a government that emphasised community life, banned new shopping malls and cancelled the province's participation in a project to build a nuclear reactor. At the age of 67, MacLean retired as Premier on November 17, 1981 and did not run in the 1982 provincial election preferring to return to the family farm.