Çatalağzı is a town (belde) in the Kilimli District, Zonguldak Province, Turkey.

The town is situated in a valley which runs parallel to Black Sea coast.

The settlement was probably known as Psylla during the ancient times and Amastris, the daughter of Darius III of Achaemenid Empire lived around the settlement.

After the Byzantine and Genoa colonial periods, the settlement was captured by the Ottoman Empire.

In 1954 Çatalağzı was declared as a seat of township.