Mark Odom Hatfield (July 12, 1922 – August 7, 2011) was an American politician and educator. He was a Republican, even though he mostly voted with Democratic senators. He was born in Dallas, Oregon.
From 1957 to 1959, he was the Oregon Secretary of State. From 1959 to 1967, he was the Governor of Oregon. Between 1967 to 1997, Hatfield was the United States Senator from Oregon.
Hatfield died in Portland, Oregon on August 7, 2011 at the age of 89.