Duncan Campbell Ross (16 December 1871 – 10 January 1961) was a Canadian lawyer and Liberal politician.
He represented Middlesex West in the House of Commons from 1909 to 1921.
During the Conscription Crisis of 1917, Ross remained loyal to the anti-conscription (and largely francophone) Laurier Liberals, and was one of only 8 members of the faction to be elected from Ontario in that year's election.
He is the son of Sir George William Ross who was Premier of Ontario from 1899 to 1905.
[citation needed] This article about a Liberal Party of Canada Member of the Parliament of Canada is a stub.