Post Office - Ashton 605 Brown Ave Ashton, IL 61006 Phone : (815) 453-2212 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (815) 453-7369 Us Government--postal Service, Ashton Brown Ashton, IL 61006 Phone : (815) 453-2212 Business Category Government Offices-Federal Government Offices & Public Schools