The Beqaa Valley (Arabic: وادي البقاع‎, Wādī l-Biqā‘, Lebanese [bʔaːʕ]; Armenian: Բեքայի դաշտավայր), also transliterated as Bekaa, Biqâ, and Becaa and known in classical antiquity as Coele-Syria, is a fertile valley in eastern Lebanon. It is Lebanon's most important farming region. Industry also flourishes in Beqaa, especially that related to agriculture.

The Beqaa is located about 30 km (19 mi) east of Beirut. The valley is situated between Mount Lebanon to the west and Anti-Lebanon mountains to the east. It forms the northeasternmost extension of the Great Rift Valley, which stretches from Syria to the Red Sea. Beqaa Valley is about 120 kilometres (75 mi) in length and has an average width of about 16 kilometres (9.9 mi). It has a Mediterranean climate of wet, often snowy winters and dry, warm summers. The region receives limited rainfall, particularly in the north, because Mount Lebanon creates a rain shadow that blocks precipitation coming from the sea. The northern section has an average annual rainfall of 230 millimetres (9.1 in)), compared to 610 millimetres (24 in) in the central valley. Two rivers originate in the valley: the Orontes (Asi), which flows north into Syria and Turkey, and the Litani, which flows south and then west to the Mediterranean Sea.