An official U.S. Postal Service office locator can be found on its official website, USPS.com. Access the tool by clicking on the Quick Tools menu and selecting Find USPS Locations.
The USPS website offers a number of other useful services, in addition to its post office locator. Almost any part of the mailing or shipment process can be managed online. This includes ordering supplies such as envelopes and stamps, estimating a shipment price or scheduling a USPS pickup. Any package can then be tracked online or through the USPS mobile app. The website offers services for businesses and international shipments as well.