John Thiessen (February 23, 1906[1]–March 25, 1978[2]) was a farmer and political figure in Saskatchewan.
He represented Shellbrook from 1956 to 1964 in the Legislative Assembly of Saskatchewan as a Co-operative Commonwealth Federation (CCF) member.
He was born in Aberdeen, Saskatchewan, the son of J.J. Thiessen, of Dutch descent, and was educated there.
In 1929, Thiessen married Maria Loeppky; they lived in Canwood.
[1] Thiessen served as secretary-treasurer and reeve for the rural municipality of Canwood, as a justice of the peace, as a founding member of the Canwood community health clinic and as president and treasurer of the Aberdeen Board of Trade.