Çatalca is a city and a rural district in Istanbul, Turkey.

It is in East Thrace, on the ridge between the Marmara and the Black Sea. Most people living in Çatalca are either farmers or those visiting vacation homes. Many families from Istanbul come to Çatalca during weekends to hike in the forests or have picnics.



Çatalca's ancient Greek name was Ergískē (Ἐργίσκη). Ergiske (Ancient Greek: Ἐργίσκη) was an ancient Greek city in Thrace, located in the region of the Propontis.

According to Suida, the Greek name is after Ergiscus (Ἐργίσκος), a son of Poseidon through the naiad (nymph) Aba (Ἄβα). In Greek mythology, Aba was a nymph and she is presumed to be a daughter of the river Hebros. The site is now occupied in part by modern Çatalca.

Under Roman rule, it was named Metrae or Metre and was important enough in the Late Roman province of Europa to become a suffragan of its capital Heraclea's Metropolitan Archbishop, yet was to fade.

Modern period

Bulgarian bayonet charge at the "Battle of Çatalca"
Çatalca was settled throughout the Ottoman period, with a typical Ottoman mixed population of Greeks and Turks. The Crimean War caused a mass exodus of Crimean Tatars towards Ottoman lands. A few Crimean Tatars settled in Çatalca.

In the First Balkan War the Bulgarian army had driven the Turkish forces back from the border, but the Turkish forces retreated to the prepared positions at Çatalca where on 16–17 November 1912 they defeated the Bulgarians at the "First Battle of Çatalca". The Çatalca fortifications formed a line across the peninsula, the "Chataldja line", which became the armistice line of 3 December 1912, after Bulgaria decided not to attack Adrianople at that time. Upon expiration of the armistice, on 3 February [O.S. 21 January] 1913, hostilities recommenced and the Second Battle of Çatalca began. It was a series of thrusts and counter-thrusts by both the Ottomans and the Bulgarians and lasted until 3 April 1913. There were a large number of journalists who reported on the military actions at Çatalca, whose accounts provide rich details about this event.

Before 1930, Çatalca also covered present districts of Arnavutköy, Beylikdüzü, Büyükçekmece, western parts of Başakşehir, rural parts of Eyüp and Sarıyer. In 1930 county (bucak) of Kilyos was part of district of Sarıyer, used to be part of Beyoğlu. 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. In 1963, villages as Arnavutköy, Bolluca, Hacımaşlı, Haraççı and İmrahor of Boyalık (its center was Hadımköy) county part of district of Gaziosmanpaşa, formerly part of Eyüp. In 1972 Tayakadın village of Boyalık county and Yeniköy one of it were passed to Gaziosmapaşa. In 1987 county of Büyükçekmece was separated and become district. Finally in 2009 remainder of Boyalık county was passed to Arnavutköy, was part of Gaziosmanpaşa and Muratbey village was passed to Büyükçekmece.


Çatalca has an area of 1,715 km² and 135 kilometers of coastline. Its neighbors include Çatalca to the south, and Silivri and Tekirdağ Province to the west. Avcılar, Küçükçekmece, and Arnavutköy lie to the east. Fresh water for Istanbul is provided from by lakes Durusu and Çatalca.

Yalıköy is a seaside resort of Çatalca. The Çilingoz Nature Park west of Yalıköy offers camping and outdoor recreation activities.

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