Post Office - Olney 1941 Highway O Olney, MO 63370 Phone : (573) 656-3513 Post Office - Olney Business Category Post Offices Toll-Free           (800) ASK-USPS U S Government--post Office, Olney Olney, MO 63370 Phone : (573) 656-3513 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools