Martin Edwin Trapp (April 18, 1877 – July 26, 1951) was an American state auditor, governor and lieutenant governor of the U.S. state of Oklahoma. Oklahoma's third lieutenant governor, he was the first to become governor not through an election but instead due to the previous governor's impeachment.Trapp served as the first state auditor and third lieutenant governor of Oklahoma. When Governor Jack Walton was impeached and removed from office, Trapp became the sixth governor of Oklahoma.