| Leonard Simpson | |
| Office: | Ontario MPP |
| Term Start: | 1929 |
| Term End: | 1940 |
| Predecessor: | Charles Ernest Wright |
| Successor: | Duncan McArthur |
| Constituency: | Simcoe Centre |
| Party: | Liberal |
| Birth Date: | 30 July 1882 |
| Birth Place: | Thornton, Ontario |
| Death Place: | Picton, Ontario |
| Spouse: | Eleanor M. Dutcher |
| Occupation: | Physician |
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, Ontario.[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, Ontario at the age of 58.[5]