Sydney Seymour Simpson (November 18, 1856[1] – 1939[2]) was an English-born farmer and political figure in Saskatchewan.
He represented Battleford in the Legislative Assembly of Saskatchewan from 1908 to 1917 as a Liberal.
He was born in Ledsham, West Yorkshire, the son of Michael H. Simpson.
In 1883, he travelled west in Canada, settling in Battleford, Saskatchewan.
Simpson married Margaret Ann Speers.