Cornwallville Post Office 12418

This page provides details for the Cornwallville post office located at 2893 Route 20 Cornwallville New York 12418. Below you will find the post office phone number, hours of operations, what services they provide and other useful information to help you determine if this is the post office location you are looking for. The people working at this location should be able to assist you with things like changing your mailing address, assist in helping you file a claim for missing mail and sell office supplies like stamps, money orders and if available, PO boxes. If you plan to visit this Cornwallville post office in New York, then we recommend you contact them first to verify their address and the services they provide, as this may have changed.