Jack Richard Miller (born June 6, 1916) was a Republican senator from the state of Iowa who served in the United States Senate from January 3, 1961, to January 3, 1973. A member of the Republican Party, he represented Iowa in the Senate for two consecutive terms, reflecting sustained electoral support over more than a decade of service in Congress. His tenure places him among the historical members of Congress from Iowa during the mid-twentieth century.

During his time in office, Miller held the role of senator rather than representing a specific congressional district, as is standard for members of the U.S. Senate. He is recorded as a former officeholder, with no additional official positions, committee assignments, or contact details provided in the available metadata. His congressional service is documented under the bioguide ID M000730.