Tartus (Arabic: طرطوس‎ / ALA-LC: Ṭarṭūs; also transliterated Tartous) is a city on the Mediterranean coast of Syria. Tartus is the second largest port city in Syria (after Latakia), and the largest city in Tartus Governorate. The population size is 115,769 (2004 census).

The city lies on the eastern coast of the Mediterranean Sea bordered by the Alawite Mountains to the east. Arwad, the only inhabited island on the Syrian coast, is located a few kilometers off the shore of Tartus.

Tartus occupies most of a flat area, surrounded to the east by hills composed mainly of limestone and, in certain places around the town of Souda, basalt.

The climate is Mediterranean, with short winter months and a moderate temperature from April to October. The hills to the east of the city create an alternative environment and climate. Tartus is known for its mild weather and high precipitation. Humidity in the summer can reach 80%.

The History of Tartus goes back to the 2nd millennium BC when it was founded as a Phoenician colony of Aradus. The colony was known as Antaradus (from Greek "Anti-Arados → Antarados", Anti-Aradus, meaning "The town facing Arwad"). Not much remains of the Phoenician Antaradus, the mainland settlement that was linked to the more important and larger settlements of Aradus, off the shore of Tartus, and the nearby site of Amrit.