United States Government--post Office, Littlefield Mesquite, NV 89024 Phone : (928) 347-5201 Business Category Post Offices Government Offices & Public Schools Post Office - Littlefield 3288 E Mcknight Rd Littlefield, AZ 86432 Phone : (928) 347-5201 Post Office - Littlefield Business Category Post Offices Toll-Free           (800) ASK-USPS