United States Government--postal Service, Local Area Post Offices, Machias 9742 Route 16 Machias, NY 14101 Phone : (716) 353-8561 Business Category Post Offices Government Offices & Public Schools Post Office - Machias 9742 Route 16 Machias, NY 14101 Phone : (716) 353-8561 Post Office - Machias Business Category Post Offices Toll-Free           (800) ASK-USPS