Post Office - Cpu Tusayan General Store 236 Highway 64 Grand Canyon, AZ 86023 Phone : (928) 638-2512 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (928) 638-3160 Post Office - Grand Canyon 100 Mather Business Ctr Grand Canyon, AZ 86023 Phone : (928) 638-2512 Post Office - Grand Canyon Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (928) 638-3160