Ottoman era

Shards from the early Ottoman era have been found here.^[4] In 1596 the village appeared in Ottoman tax registers under the name of ‘’Usarin’’, and as being in the nahiya of Jabal Qubal in the liwa of Nablus. It had a population of 10 households and 4 bachelors, all Muslim. They paid a fixed tax-rate of 33,3 % on agricultural products, including wheat, barley, summer crops, olive trees, goats and beehives, in addition to occasional revenues and a press for olive oil or syrup; a total of 2,900 Akçe.^[5]

In 1838, Ausarin was noted as a village in the District of El-Beitawy, east of Nablus.^[6]

In 1870 Victor Guérin noted the village, situated on a hill.^[7]

British Mandate era

In the 1922 census of Palestine, conducted by the British Mandate authorities, Ausarin had a population of 87 Muslims,^[8] increasing in the 1931 census to 122 Muslim, in 34 houses.^[9]

In the 1945 statistics, Usarin had a population of 200 Muslim,^[10] with 2,185 dunams of land, according to an official land and population survey.^[11] Of this, 347 dunams were plantations and irrigable land, 1,098 were used for cereals,^[12] while 11 dunams were built-up land.^[13]

Jordanian era

In the wake of the 1948 Arab–Israeli War, and after the 1949 Armistice Agreements, Osarin came under Jordanian rule.

The Jordanian census of 1961 found 293 inhabitants in Usarin.^[14]

1967-present

After the Six-Day War in 1967, Osarin has been under Israeli occupation.

During the early months of the First Intifada, on 23 March 1898, Adli Maher Sa'id, aged 14, was shot dead. An Israeli citizen, Ovadia Saluni from Masua, was detained as a suspect,^[15]

After the 1995 accords, 83% of the village land is defined as Area B land, while the remaining 17% is Area C.^[16]