Harold Henry Barker (15 June 1889, in Elbow Lake, Minnesota – 23 March 1949) was a Minnesota Farmer-Laborite politician, candidate for Governor of Minnesota, and a Speaker of the Minnesota House of Representatives. He was elected to the Minnesota House of Representatives, in 1930, where he caucused with the Liberal Caucusin the then-nonpartisan body. In 1937, he was elected to serve as speaker, a position he held for two years. His father, H. W. Barker, served in the Wisconsin State Senate.
In 1946, Barker served as the second gubernatorial candidate after of the merger of the Minnesota Democratic and Farmer-Labor Parties into the Democratic-Farmer-Labor Party, losing to Luther Youngdahl.