Thomas Madox (1666 – 13 January 1727) was a legal antiquary and historian, known for his publication and discussion of medieval records and charters; and in particular for his History of the Exchequer, tracing the administration and records of that branch of the state from the Norman Conquest to the time of Edward II. It became a standard work for the study of English medieval history. He held the office of historiographer royal from 1708 until his death.