The Arab Socialist Ba'ath Party – Syria Region (Arabic: حزب البعث العربي الاشتراكي – قطر سوريا Ḥizb al-Ba'th al-'Arabī al-Ishtirākī – Quṭr Sūriyā), officially the Syrian Regional Branch (Arabic: الفرع القطري السوري), was a neo-Ba'athist organisation founded on 7 April 1947 by Michel Aflaq, Salah al-Din al-Bitar and followers of Zaki al-Arsuzi. The party ruled Syria from the 1963 coup d'état, which brought the Ba'athists to power, until 8 December 2024, when Bashar al-Assad fled Damascus in the face of a rebel offensive during the Syrian civil war. It was formally disbanded in January 2025.
The party was founded on 7 April 1947 as the Arab Ba'ath Party through the merger of the Arab Ba'ath Movement led by Michel ʿAflaq and Salah al-Din al-Bitar and the Arab Ba'ath, led by Zaki al-Arsuzi. The party espoused Ba'athism, an ideology mixing Arab nationalist, pan-Arab, Arab socialist, and anti-imperialist interests. Ba'athism calls for the unification of the Arab world into a single state. It quickly established branches in other Arab countries, although it would only hold power in Syria and in Iraq. Following their ascent to power in 1963, neo-Ba'athist officers proceeded to stamp out the traditional civilian elites in order to construct a military dictatorship operating on totalitarianlines; wherein all state agencies, party organisations, public institutions, civil entities, media and health infrastructure were tightly dominated by the military establishment and the Mukhabarat (intelligence services).