The Green Line was a line of demarcation in Beirut, Lebanon during the Lebanese Civil War from 1975 to 1990. It separated the mainly Muslim factions in West Beirut from the Christian Lebanese Front in East Beirut. The appellation refers to the coloration of the foliage that grew because the space was uninhabited. Many of the buildings along the Green Line were severely damaged or destroyed during the war. Since the end of hostilities, however, many of the buildings have been rebuilt within the framework of the urban renewal project of Solidere in Beirut Central District.

The Green Line did not simply divide Muslim from Christian. Before the civil war, Beirut was a cosmopolitan, multiethnic city with significant Maronite, Shiite, Sunni, Druze, Armenian and Greek Orthodox communities. The Maronites and Muslim Sunni and Shiite were well separated by the Green Line, while the others were more mixed between East and West Beirut.

The Green Line was a vulnerable point for both West and East Beirut. During Israel's siege of West Beirut, Israel surrounded Western Beirut and stationed tanks along the Green Line.

Lebanon (ⁱ/ˈlɛbənɒn/ or /ˈlɛbənən/; Arabic: لبنان‎ Libnān or Lubnān, Lebanese Arabic: [lɪbˈneːn]), officially the Lebanese Republic (Arabic: الجمهورية اللبنانية‎ al-Jumhūrīyah al-Libnānīyah, Lebanese Arabic: [elˈʒʊmhuːɾɪjje l.ˈlɪbneːnɪjje]), is a country in the East Mediterranean. It is bordered by Syria to the north and east, and Israel to the south. Lebanon's location at the crossroads of the Mediterranean Basin and the Arabian hinterland has dictated its rich history, and shaped a cultural identity of religious and ethnic diversity.

The earliest evidence of civilization in Lebanon dates back more than 7,000 years—predating recorded history. Lebanon was the home of the Phoenicians, a maritime culture that flourished for nearly 2,500 years (3000–539 BC). Following the collapse of the Ottoman Empire after World War I, the five provinces that comprise modern Lebanon were mandated to France. The French expanded the borders of Mount Lebanon, which was mostly populated by Maronite Catholics and Druze, to include more Muslims. Lebanon gained independence in 1943, and established a unique political system, known as confessionalism, a power-sharing mechanism based on religious communities – Bechara El Khoury who became independent Lebanon's first President and Riad El-Solh, who became Lebanon's first prime minister, are considered the founders of the modern Republic of Lebanon and are national heroes for having led the country's independence. French troops withdrew from Lebanon in 1946.

Green Line may refer to: