1. US Post Office 2591 E M 21, Corunna, MI 48817 Coordinate: 42.99854,-84.115776 Phone: (800) 275-8777
2. United States Postal Service 330 N Shiawassee St, Corunna, MI 48817 Coordinate: 42.98278,-84.11762 Phone: (989) 743-3400