Konferenz von Lausanne
In 1948, there were 4,500 inhabitants, mostly farmers, in the Umm al-Fahm area. After the 1948 Arab–Israeli War, the Lausanne Conference of 1949 awarded the entire Little Triangle to Israel, which wanted it for security purposes. On 20 May 1949, the city's leader signed an oath of allegiance to the State of Israel. Following its absorption into Israel, the town's population grew rapidly "(see box)". By 1960, Umm al-Fahm was given local council status by the Israeli government. Between 1965 and 1985, it was governed by elected councils. In 1985, Umm al-Fahm was granted official city status.