Umm ar-Rasas is an archaeological site in the Amman Governorate of central Jordan, located about 30 kilometres southeast of Madaba. It lies in the semi-arid steppe region of the Jordanian Desert and was once reachable by branches of the King's Highway.
The site has been associated with the biblical settlement of Mephaat mentioned in the Book of Jeremiah. It was used by the Roman military as a strategic garrison and was later inhabited by Christian and Islamic communities. Its extensive ruins date to the Roman, Byzantine, and early Muslim periods, and much of the area remains buried under debris.
Excavations at the north end of the site were carried out in 1986 by the Franciscan academic society Studium Biblicum Franciscanum (SBF), based in Jerusalem. In 2004, Umm ar-Rasas was inscribed as a UNESCO World Heritage Site.