In 1948, there wur 4,500 inhabitants, maistly farmers, in the Umm al-Fahm aurie. Efter the 1948 Arab-Israeli War, the Lausanne Conference o 1949 awardit the entire Little Triangle tae Israel, which wantit it for security purposes. On 20 Mey 1949, the ceety's leader signed an oath o alliegiance tae the State o Israel. Follaein its absorption intae Israel, the toun's population grew rapidly. Bi 1960, Umm al-Fahm wis given local cooncil status bi the Israeli govrenment. In 1965-1985, it wis govrened bi electit cooncils. In 1985, Umm al-Fahm wis given offeecial ceety status.