William Bennett Bizzell (October 14, 1876 – May 13, 1944) was the president of three American higher education institutions.

In his first five years, he organized the utilities department at the university (previously, workmen reported directed to the university president for even the most trivial matters); oversaw vast improvements to the university's library system (for which the main library in the heart of the campus bears his name); presided over the building of Oklahoma Memorial Stadium and the McCasland Field House along with athletic director Bennie Owen; oversaw the new liberal arts building; approved the creation of the School of Religion; reorganized the School of Journalism; helped get funding for the creation of the University Medical Center in Oklahoma City, Oklahoma; established the University Press; increased the salary of the faculty; converted the School of Business from a two-year program to a four-year program and renamed it the College of Business Administration; and saw the building of the new Oklahoma Memorial Union.

He was elected president of the National Association of State Universities; he received the Medal of Excellence from Columbia University; and he was selected from all college presidents as the one to write the article on higher education for the Encyclopedia Americana.

The Board of Regents invited him to remain on the staff as president emeritus and head of the sociology department.

Just three years after he resigned as president of the university, Bizzell died in Norman on May 13, 1944.