The Twentieth Oklahoma Legislature was a meeting of the legislative branch of the government of Oklahoma, composed of the Oklahoma Senate and the Oklahoma House of Representatives. The state legislature met in regular session from January 2 to April 26, 1945, during the term of Governor Robert S. Kerr. Although the session began with John Davis Hill as Speaker of the Oklahoma House of Representatives, he was replaced with H.I. Hinds in February. Homer Paul served as President pro tempore of the Oklahoma Senate.