Al-Qadmus is a town located in northwestern Syria within the Tartus Governorate. Geographically, it is situated just east of the Mediterranean coast, positioned approximately 14 kilometres southeast of Baniyas and northeast of Tartus.
The area surrounding Al-Qadmus includes several nearby localities, such as Kaff al-Jaa and Masyaf to the east, Wadi al-'Uyun and al-Shaykh Badr to the south, and Taanita to the west. A notable landmark in the vicinity is a ruined castle situated on a plateau roughly 850 metres above sea level, located just above the town.