Passport Application Services - Oswego 391 W 1st St Oswego, NY 13126 Phone : (315) 343-3881 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Post Office - Oswego 391 W 1st St Oswego, NY 13126 Phone : (315) 343-3881 Post Office - Oswego Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--veterans Affairs Dept Of Regional Office, Oswego 391 W 1st St Oswego, NY 13126 Phone : (315) 343-3881 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools