U S Government--hospital, Polacca, Second Mesa Polacca, AZ 86042 Phone : (928) 737-2560 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Second Mesa 383 Highway 264 Second Mesa, AZ 86043 Phone : (928) 737-2560 Post Office - Second Mesa Business Category Post Offices Toll-Free           (800) ASK-USPS