The 20th Century

At the start of the 20th century, Americans were served by the Post Office Department. At the century’s close, they were served by the United States Postal Service. At the beginning of the 20th century, most Americans lived in rural areas. By its end, the country was an industrial and service economy of international preeminence, and the character, volume, and means of transporting mail had changed. The Post Office Department, transformed into the United States Postal Service, continued its tradition of innovation, adaptation, and change to better serve postal customers.