Beit Sira (Arabic: بيت سيرا‎) is a Palestinian village in the central West Bank, located 22 kilometers west of Ramallah and is a part of the Ramallah and al-Bireh Governorate. The village is situated along the Green Line and during the 1948 Arab-Israeli War, around 4,000 dunams of its land became a part of the "No-Man's Land" strip between the north-central West Bank and Israel. Currently Beit Sira's jurisdiction is 3,120 dunams, of which 441 dunams are built-up areas and the remainder open spaces for future construction or agricultural land.

In 1922, Beit Sira had a population of 381. According to the Palestinian Central Bureau of Statistics, Beit Sira had a population of 2,840 inhabitants in 2006. In the 2007 PCBS census, there were 2,749 people living in the town.