Marcus Aponius Saturninus was a man of ancient Rome who was the child of wealthy senatorial parents, who owned property in Egypt. He is recorded in the Acta Arvalia as being present for sacrifices on the Capitol with the emperor Nero in 66. We next hear of him as serving as the governor of Moesia in 69, and may have been an appointment of Galba. He repulsed the Sarmatians, who had invaded the province, and was in consequence rewarded by a triumphal statue at the commencement of Otho's reign.