The village expanded during the British mandate period, and houses were built eastward and southward.
In the 1922 census of Palestine, conducted by the British Mandate authorities, Dumra  had a population of 251, all Muslims, increasing in the 1931 census  to 324, still all Muslim, in  100 houses.

In the 1945 statistics   Dimra had a population of 520, all Muslims,  with a total of 8,492  dunams of land, according to an official land and population survey.
 Of this, 96 dunams were used for citrus and bananas, 388 dunams were for plantations and irrigable land, 7,412  for cereals, while 18  dunams were built-up land.
 An elementary school opened in Dimra in 1946, with an initial enrollment of 47 students.
The village expanded during the British mandate period, and houses were built eastward and southward. In the 1922 census of Palestine, conducted by the British Mandate authorities, Dumra  had a population of 251, all Muslims, increasing in the 1931 census  to 324, still all Muslim, in  100 houses.
In the 1945 statistics   Dimra had a population of 520, all Muslims,  with a total of 8,492  dunams of land, according to an official land and population survey.  Of this, 96 dunams were used for citrus and bananas, 388 dunams were for plantations and irrigable land, 7,412  for cereals, while 18  dunams were built-up land.  An elementary school opened in Dimra in 1946, with an initial enrollment of 47 students.
Dimra