Avon, Colorado Post Offices Select the Avon, Colorado office or location nearest you to see more information such as office hours, address, phone numbers, passport services, PO box services and other services provided by your Avon, Colorado USPS office. Welcome to USPS.com. Find information on our most convenient and affordable shipping and mailing services. Use our quick tools to find locations, calculate prices, look up a ZIP Code, and get Track & Confirm info. 111 W Beaver Creek Blvd Avon, CO 81620 The Avon Post Office is located in the state of Colorado within Eagle County. This location serves 10,450 Avon residents with a median income of $55,488. Find Post Office jobs in Avon, CO. Search for full time or part time employment opportunities on Jobs2Careers. Avon Post Office at West Beaver Creek Boulevard, Avon CO; Address, Phone Number, and Business Hours for Avon Post Office.