Oscar B. Jackson Jr. (born July 9, 1947) is an American civil servant from the state of Oklahoma.
With over twenty years of continuous service, Jackson is the longest serving Cabinet Secretary in State history.
In 2005, he was selected as an inaugural member of the University of Oklahoma College of Education Alumni Hall of Fame.
[1] In 1991, Jackson was appointed Secretary of Human Resources by Democratic Governor of Oklahoma David Walters.
Jackson has since remained in that position under two more administrations: Frank Keating (1995–2003) and Brad Henry (2003 – 2011).