John Andrew Jackson Creswell (November 18, 1828 – December 23, 1891) was an American politician from Maryland, who served as United States Representative, United States Senator, and as Postmaster General of the United States appointed by President Ulysses S. Grant. Creswell is considered to be one of the ablest, if not the best, Postmaster General in United States history. Creswell modernized the U.S. Postal system to adapt to an expanding demand for increased postal routes throughout the Western states and remain competitive worldwide. Sweeping and constructive reforms of the United States Postal System took place during Creswell's tenure, including securing fair competition among Star Route carriages, and the abolishment of the franking system. Creswell developed a codified classification system of offenses against postal laws. Creswell streamlined and reduced postal costs making the United States Postal System run efficiently creating a fair pricing system domestically, and reducing international mailing prices. Creswell developed and implemented the United States first penny postcard.