William Sancho Thair (February 20, 1887[1] – November 28, 1966[2]) was a farmer and political figure in Saskatchewan, Canada.
He was born near Holstein, Ontario, the son of Philip Franklin Thair and Hannah Maria Mickleborough.
Thair was a member of the United Farmers of Canada and the Saskatchewan Wheat Pool.
[2] He represented Lumsden in the Legislative Assembly of Saskatchewan from 1944 to 1956 as a Co-operative Commonwealth Federation (CCF) member.
Among Thair's personal political highlights was introducing legislation which created provincial-wide state-operated crop insurance.