Under the British Mandate in Palestine, a village council was established to administer local affairs, and Hamama had a mosque, and two primary schools for boys and girls established in 1921. In the 1922 census of Palestine, conducted by the British Mandate authorities, Hamama had a population of 2,731; 2,722 Muslims and 9 Christians, where all the Christians were Orthodox. The population had increased in the 1931 census to 3,405; 3,401 Muslims and 4 Christians, in a total of 865 houses.