USPS Carterville, IL

United States Postal Service (USPS) is an independent agency of the United States federal government, responsible for providing postal services within the country. It is the only organization in the US that is authorized to deliver mail to every address, including PO boxes and military addresses. With a network of more than 31,000 retail locations and delivery points, USPS serves millions of customers every day. The company offers a range of services, including first-class and priority mail, international shipping, flat-rate boxes, and more. Known for its reliable and efficient service, USPS is a trusted partner for individuals and businesses across the country.