Robert Irwin (January 17, 1865 – December 7, 1941) was a merchant and political figure in Nova Scotia, Canada, and father of Robert Grandy and Prescott St.
Clair.
He represented Shelburne County in the Nova Scotia House of Assembly from 1906 to 1925 as a Liberal member.
Irwin was the 17th Lieutenant Governor of Nova Scotia from 1937 to 1940.