Daniel Duncan McDonald (May 13, 1865 – November 1945) was a politician in Manitoba, Canada.
McDonald was born in Nairn, Canada West (now Ontario), and educated at Lochaber, East Williams Township in Middlesex County.
The Conservatives won the election, and McDonald served in the legislature as a member of the opposition.
McDonald then left the Liberal Party, and attempted to return to the legislature as a Conservative in the 1915 election.
The Conservatives were resoundingly defeated in this campaign, and McDonald lost to Liberal candidate William Sims by 212 votes.