John Muirhead (July 11, 1877 – 1954) was a politician in Manitoba, Canada. He served in the Legislative Assembly of Manitoba from 1922 to 1936.^[1]

Muirhead was born in Clinton, Ontario and was educated at public schools. He worked as a farmer, and served as a school trustee and municipal assessor. In 1906, Muirhead married Lucy E. Dunfield.^[2]

He was first elected to the Manitoba legislature in the 1922 provincial election as a candidate of the United Farmers of Manitoba (UFM), defeating Conservative incumbent Reuben Waugh^[1] by 137 votes in the Norfolk constituency. The UFM unexpectedly won a majority of seats in this election, and formed government as the Progressive Party. Muirhead served as a backbench supporter of John Bracken's government throughout his time in the legislature.

He was returned in the 1927 election, defeating Waugh^[1] by thirty-four votes in a rematch from the 1922 contest. He defeated Waugh a third time in the 1932 election,^[1] by 236 votes.

He was defeated in the 1936 election, losing to Conservative John Lawrie^[1] by eighty-two votes. He sought a return to the legislature in the 1941 election, but lost to Lawrie^[1] by forty-four votes.