Bert Henry Miller (December 15, 1876 – October 8, 1949) was an American politician from Idaho and a member of the Democratic Party.

He was an unsuccessful candidate for the Democratic gubernatorial nomination in 1936, and served for two months in 1938 as Idaho's labor commissioner.

Miller was an unsuccessful Democratic candidate for election in 1938 in the second district to the Seventy-sixth Congress, then was an attorney in the Wage and Hour Division of the U.S. Labor Department at Seattle, Washington in 1939 and 1940.

Miller "expressed an even more extreme view, advocating that they be put into concentration camps for the remainder of the war and that no attempt be made to provide work for them.

Miller was elected to the United States Senate in 1948, defeating Republican incumbent Henry Dworshak, but died of a heart attack after only nine months in office.