The United States Postal Service is a government agency located at 503 Main Street in Augusta, Illinois. It serves as a post office and provides various financial services to the public. The institution offers a wide range of mailing and shipping options, as well as money orders, postal banking, and other financial products. Customers can also purchase stamps, send packages, and access other postal services at this location. The United States Postal Service plays a crucial role in connecting people and businesses across the country through reliable mail delivery and financial services.