Captain Franz Dagobert Johannes von Rintelen (1877 – 30 May 1949) was a German Naval Intelligence officer in the United States during World War I. He came from a banking family with good connections in American banking, having served with Deutsche Bank as well as acting as U.S. representative for Disconto-Gesellschaft, then Germany's number two bank, beginning in 1906. He also spoke excellent English. He returned to Germany in 1920, a forgotten man. He moved to England, where he died on 30 May 1949.