Leonard Jennett Simpson (July 30, 1882[1] – August 18, 1940)[2] was a physician and political figure in Ontario. He represented Simcoe Centre in the Legislative Assembly of Ontario from 1929 to 1940 as a Liberal member.[3]
The son of James Simpson and Rachael Jennett, he was born in Thornton.[1] Simpson was educated at the University of Toronto.[2] In 1911, he married Eleanor M. Dutcher. Simpson ran unsuccessfully for a seat in the Ontario assembly in 1923.[1] He served as Minister of Education from 1934 to 1940.[3] In 1935, he was named honorary president of the Royal Astronomical Society of Canada.[4] Simpson died in office in Picton at the age of 58.[5]