[9] The Arab geographer Zakariya al-Qazwini in his Athar al-bilad cited a 10th-century mention of Sinḥil, though this cannot be verified from extant manuscripts.

[10] The village paid ecclesiastical tithes to the Church of the Holy Sepulchre in Jerusalem while a Frankish parish, until they were transferred in 1145 to the monastery on Mount Tabor.

It had a population of 55 households, all Muslim, and paid a fixed tax rate of 33,3% on wheat, barley, vineyards, fruit trees, goats and beehives; a total of 9,900 akçe.

[20] Guérin further noted, "On the summit of the hill are observed the foundations of two strongholds, built of great blocks, evidently ancient, one of which is called the Kasr ("Fort"), and the other the Keniseh ("Church").

[22][23] In 1882, the PEF's Survey of Western Palestine described Sinjil as being of moderate size, with several houses of two storeys, on a hill side with fine fig gardens below.

[26] In 1922, Tawfiq Canaan documented the belief among some of the villagers that the biblical Joseph was thrown into a pit in the proximity of Sinjil.

[29] Of this, 4,169 were allocated for plantations and irrigable land, 4,213 for cereals,[30] while 47 dunams were classified as built-up (urban) areas.

[34] On Wednesday, 7 April 2015, a 32-year-old resident of Sinjil stabbed and injured two paramedics sitting in an ambulance near the entrance to Shiloh.

[35] On 26 March 2023, Israeli settlers threw a Molotov cocktail at a house in Sinjil which caught fire.

[36][37] According to Amira Hass, Jewish settlers have hampered villagers' access to their traditional lands.

[38] In January 2012, the United States Agency for International Development financed road work and renovations of the Abu Bakr as-Saddeeq boys' school in Sinjil.

[40] In 2007, Aziz Shihab whose family was from Sinjil, wrote a memoir of his journey to the village Does the Land Remember Me?

[41][42] His daughter, Naomi Shihab Nye, who stayed there in 1966, aged 14, and recalls her sojourn as having a formative influence on her poetics.