Çatalca (Turkish pronunciation: [tʃaˈtaɫdʒa]) is a municipality and district of Istanbul Province, Turkey.

According to ancient texts, it was named after Ergiscus (Ἐργίσκος), a son of Poseidon through the naiad (nymph) Aba (Ἄβα), presumed in Greek mythology to be a daughter of the river Hebros.

[10] There were a large number of journalists who reported on the military actions at Çatalca, whose accounts provide rich details about this event.

At same time, villages of Odayeri, Ağaçlı, İhsaniye and Kısırmandıra (Işıklar after 1987) were passed to Kemerburgaz county (formerly part of Beyoğlu district) of Sarıyer.

Its neighbors include Tekirdağ Province to the west, Silivri to the southwest, Büyükçekmece to the south, and Arnavutköy to the east.

The Çilingoz Nature Park west of Yalıköy offers camping and outdoor recreation activities.