It has been suggested that this was "apparently connected with an ancientIshvah or Mizpeh," but this does not agree with modern archaeology. Ceramic remains from the Byzantine era have been found here, as have sherds from the Crusader/Ayyubid and Mamluk eras.
Pottery sherds from the early Ottoman era have also been found here, and it was mentioned in the sixteenth hundreds tax records under the name of Kafr Shu. In 1838 Um Safah was noted as a Muslim village the Beni Zaid district. In 1870, Victor Guérin climbed up on the hilltop which Umm Safa occupied, and found that the village had about 300 inhabitants. He further noted that: "It must go back to an ancient site as is shown by the materials used in the building of some houses and several columnar sections scattered about the ground. A copious spring, called Ain Umm Safa, provides the villagers with water. They venerate, under a koubbeh, the remains of Nabi Hanan." An official Ottoman village list from about the same year, 1870, listed Kefr Eschwa as having 24 houses and a population of 120, though the population count included men, only. It was noted as being located north of Dschibija. In 1882 the PEF's Survey of Western Palestine described Umm Suffah as "a village on high ground on the Roman road toAntipatris. It contains a small mosque or Moslem chapel, and has a well to the north."
In the 1922 census of Palestine, conducted by the British Mandate authorities, Umm Sufa had a population of 80 Muslims, increasing in the 1931 census to 89 Muslims, in 27 houses in Umm Safah. In the 1945 statistics, the population of Umm Safa was 110 Muslims, while the total land area was 4,083 dunams, according to an official land and population survey. Of this, 1,364 dunums were used for plantations and irrigable land, 821 for cereals, while 17 dunams were classified as built-up areas.
Since the Six-Day War in 1967, Umm Safa has been under Israeli occupation. After the 1995 accords, 16% of village land has been defined as Area B land, while the remaining 84% is Area C. Israel has confiscated a total of 227 dunams of land from the village in order to construct two Israeli settlements: Ateret and Hallamish. The village have two tombs within it.