Robert Dinsmore Harrison (January 26, 1897 – June 11, 1977) was a Nebraska Republican politician. Born on a farm near Panama, Nebraska on January 26, 1897, he graduated from Nebraska State Teachers College, now known as Peru State College in 1926. He also graduated from University of California in 1928 and University of Nebraska in 1934. In 1918 to 1919, during World War I, he was a sergeant in the Twenty-second Engineers. He was the superintendent of schools in Bradshaw, Nebraska (1926–1929) and De Witt, Nebraska (1929–1937). He was a member of the school board of Norfolk, Nebraska from 1942 to 1951 and a member of the Governor's Highway Advisory Committee. He owned an oil business in Norfolk and a farm in Cedar County, Nebraska.