John Burton Martyn (July 22, 1867 – 1921) was an Ontario physician and political figure.
He represented Lambton East in the Legislative Assembly of Ontario from 1914 to 1919 as a Conservative member.
He was born in Strathroy, Ontario and moved to Alvinston with his family in 1874.
He was unsuccessful in his bid for reelection in 1919, losing to Leslie Warner Oke of the United Farmers of Ontario.
This article about an Ontario Progressive Conservative Party MPP is a stub.