Marion Stafford Hansell was born just outside Athena, Oregon, in 1913. He grew up on a farm in Umatilla County, Oregon. As a child, he contracted both diphtheria and polio, which resulted in long-term health problems. He studied prelaw at the University of Montana, then transferred to Whitman College in his junior year and changed his major to economics. He graduated in the spring of 1937. He met Mary Elizabeth Ennis while at Whitman College. They married in 1937 and adopted a son, John Stafford Hansell, in 1947. They settled in Umatilla County, and Stafford Hansell worked on his father's farm. He later ran a hog farm with his brother, Bill Hansell. He was elected to his local school board and served from 1943 to 1957. He represented Umatilla County in the Oregon House of Representatives from 1957 to 1974 and was an early advocate for the decriminalization of marijuana. After he left the Legislature, he served on various committees for the Bob Straub and Norma Paulus administrations. He died in 1995.