The history of Lebanon covers the history of the modern Republic of Lebanon and the earlier emergence of Greater Lebanon under the French Mandate for Syria and the Lebanon, as well as the previous history of the region, covered by the modern state.

The modern State of Lebanon has existed within its current borders since 1920, when Greater Lebanon was created under French and British mandate, resulting from the dismemberment of the Ottoman Empire at the end of World War I. Before this date, the designation “Lebanon” concerned a territory with vaguely defined borders, encompassing the mountain range of Mount Lebanon and its outskirts (mainly the Mediterranean coast and the plains of Bekaa and Akkar). The idea of an independent Lebanon, however, emerged during the end of the Mount Lebanon Emirate where Maronite clerics vowed for an independent nation.