John Angus MacLean, (May 15, 1914 – February 15, 2000) was a politician and farmer in Prince Edward Island, Canada.
He was an alumnus of both Mount Allison University and the University of British Columbia with degrees in science.
MacLean served in the cabinet of Prime Minister John Diefenbaker as Minister of Fisheries from 1957 until the government's defeat in the 1963 election.
In 1976, MacLean was persuaded to leave federal politics and take the leadership of the Progressive Conservative Party of Prince Edward Island which had languished in opposition for a decade.
On 8 November 1976, MacLean was elected to the provincial legislature in a by-election.
MacLean led the party to victory in 1979, and formed a government that emphasized rural community life, banned new shopping malls and instituted a Royal Commission to examine land use and sprawl.
His government cancelled the province's participation in the Point Lepreau Nuclear Generating Station in New Brunswick.
On 17 August 1981, MacLean announced his intention to resign as premier upon the election of a new party leader.
MacLean retired as premier on 17 November 1981, when James Lee was sworn-in as his successor and did not run in the 1982 provincial election.
He returned to the family farm that he redeveloped for low-intensity blueberry farming.
A respected steward of the land and of rural communities, MacLean was a committed Presbyterian of Scottish descent.
In 1991, he was made an Officer of the Order of Canada.
He died in Charlottetown on February 15, 2000.