William Montgomery Watt, Scottish historian and scholar (b. 1909)
William Montgomery Watt (14 March 1909 – 24 October 2006) was a Scottish Orientalist, historian, academic and Anglican priest. From 1964 to 1979, he was Professor of Arabic and Islamic studies at the University of Edinburgh.

Watt was one of the foremost non-Muslim interpreters of Islam in the West, and according to Carole Hillenbrand "an enormously influential scholar in the field of Islamic studies and a much-revered name for many Muslims all over the world". Watt's comprehensive biography of the Islamic prophet Muhammad, Muhammad at Mecca (1953) and Muhammad at Medina (1956), are considered to be classics in the field.