In the 1922 census of Palestine, during the early British Mandate of Palestine period,  there were 1,367 villagers, all Muslims, increasing in the 1931 census  to 1,920 Muslims, in 445 houses.
In the 1944–45 statistics, the village had a population of 2,400 Muslims,  and the total land area was 16,268 dunams.
Of this, 1,348 dunums were irrigated or used for orchards, 6,225 dunams were for cereals, while 77 dunams were built-up (urban) Arab land.
Bayt Mahsir had three schools; two schools for boys and an elementary school for girls.
Bayt Mahsir contains a number of khirbat, including al-Huwaytiyya, al-Masi, Khatula and al-Sallam.
The villagers took pride in the fact that the last imam of its mosque, Shaykh Khalil As'ad, was a graduate of Al-Azhar University in Cairo.
In the 1922 census of Palestine, during the early British Mandate of Palestine period,  there were 1,367 villagers, all Muslims, increasing in the 1931 census  to 1,920 Muslims, in 445 houses. In the 1944–45 statistics, the village had a population of 2,400 Muslims,  and the total land area was 16,268 dunams. Of this, 1,348 dunums were irrigated or used for orchards, 6,225 dunams were for cereals, while 77 dunams were built-up (urban) Arab land. Bayt Mahsir had three schools; two schools for boys and an elementary school for girls. Bayt Mahsir contains a number of khirbat, including al-Huwaytiyya, al-Masi, Khatula and al-Sallam. The villagers took pride in the fact that the last imam of its mosque, Shaykh Khalil As'ad, was a graduate of Al-Azhar University in Cairo.
Bayt Mahsir