Clint Zweifel (born November 3, 1973), is an American politician and businessman who served as the State Treasurer of Missouri from 2009 to 2017. He is a member of the Democratic Party and the most recent member of the party to hold that office. Following completion of his service as State Treasurer, he was appointed as a managing director with Northern Trust, leading a multi-disciplinary team that includes banking, investment management and trust/advisory services.