Twelve members of the U.S. Supreme Court have served at least thirty years on the U.S. Supreme Court. They are: William O. Douglas (36 years), Stephen J. Field (34), John Marshall (34), Joseph Story (34), John Marshall Harlan (34), Hugo Black (34), William Brennan (33), William Rehnquist (33), John McLean (32), James Wayne (32), William Johnson (30), and current (as of 2007) justice John Paul Stevens (31).