According to the Phoenix Business Journal, the U.S. Postal Service is the No. 1 courier service/package delivery firm in Arizona.
The ranking is a part of the publication’s annual Courier Service/Package Delivery Firms list which is based on the average number of local packages delivered per month. USPS ranked first in the state with a reported average of 9 million per month.
United Parcel Service (UPS) was second with 5.6 million packages per month.