United States Government Eagle Rock, MO 65641 Phone : (417) 271-3434 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Eagle Rock 107 State Route 86 W Eagle Rock, MO 65641 Phone : (417) 271-3434 Business Category Post Offices Toll-Free           (800) ASK-USPS U S Government--post Office, Eagle Rock Cassville, MO 65625 Phone : (417) 271-3434 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools