Marwan al-Muasher (Arabic: مروان المعشر) (born 1956) is a former Jordanian diplomat and politician who was Jordan's foreign minister from 2002 to 2004 and its deputy prime minister during 2004 and 2005. He currently serves as vice president for studies at the Carnegie Endowment for International Peace, where he oversees research on the Middle East. He was Jordan's first ambassador to Israel and former ambassador to the United States.[1][2]