Robert Duncan Wilmot Jr. (July 17, 1837 – January 7, 1920) was a Canadian farmer, businessman and politician.

Born in Liverpool, England, where his father, Robert Duncan Wilmot, was working in the family shipbuilding business from 1835 to 1840, Wilmot was educated in Saint John, New Brunswick, and the Sunbury County Grammar School.

He was a member of the Sunbury Municipal Council and Warden of the county.

Wilmot also served as lieutenant colonel in the militia.

A Conservative, he was re-elected in 1891 but was defeated in the 1896 federal election and in an 1896 by-election.