Findlay (Finlay) George MacDiarmid (October 11, 1869 – July 15, 1933) was an Ontario farmer and political figure.

He represented Elgin West in the Legislative Assembly of Ontario as a Conservative member in 1898 and from 1900 to 1919 and from 1923 to 1929.

He was born in New Glasgow, Aldborough Township, Elgin County, Ontario, the son of Finlay MacDiarmid.

He died from a stroke at Toronto General Hospital on July 15, 1933.

This article about an Ontario Progressive Conservative Party MPP is a stub.