United States Government--post Office, Highlandville Highlandville, MO 65669 Phone : (417) 443-4422 Business Category Post Offices Government Offices & Public Schools Post Office - Highlandville 299 Kentling Ave Highlandville, MO 65669 Phone : (417) 443-4422 Business Category Post Offices Toll-Free           (800) ASK-USPS