Şile is a municipality and district of Istanbul Province, Turkey.^[2] Its area is 800 km²,^[3] and its population is 43,464 (2022).^[1] Bordering Şile is the province of Kocaeli (districts of Gebze, Körfez, Derince, Kandıra) to the east and south, and Istanbul districts of Pendik to the south, Çekmeköy to the southwest, and Beykoz to the west.^[4] The popular resort town Ağva is also a part of Şile. However, between June and September, the population rapidly increases because of the many residents of Istanbul who have summer houses in Şile.

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Şile
District and municipality
Şile castle while it was under restoration
Map showing Şile District in Istanbul Province
Şile Location in Turkey Show map of Turkey Şile Şile (Istanbul) Show map of Istanbul
Coordinates: 41°10′35″N 29°36′46″E
Country	Turkey
Province	Istanbul
Government
• Mayor	Özgür Kabadayı (CHP)
Area	800 km2 (300 sq mi)
Population  (2022)[1]	43,464
• Density	54/km2 (140/sq mi)
Time zone	UTC+3 (TRT)
Postal code	34980
Area code	0216
Website	www.sile.bel.tr

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The word şile means marjoram in Turkish.^[5] The word's etymology is said to be Greek.^[6] There has been a fishing village here since 700 BC and a lighthouse since the Ottoman period. According to the Ottoman General Census of 1881/82-1893, the kaza of Şile had a total population of 16.770, consisting of 10.314 Muslims, 6.447 Greeks, 3 Armenians and 6 foreign citizens.^[7] The boundaries of Şile were expanded by the addition of the village of Esenceli from Beykoz district in 1989.^[8]

There are 62 neighbourhoods in Şile District:^[9]

Şile is famous for its beaches. However, it is at the northernmost point of Istanbul and thus shares the same sea conditions as other Black Sea towns where strong sea undercurrents can be dangerous to inexperienced swimmers. Beachgoers drown here annually on a regular basis.^[10] The north-facing Black Sea has a much shorter holiday season than the Aegean, the Mediterranean or even the Marmara, due to the relatively colder winters. Şile Castle (Turkish: Şile Kalesi) is a 14th-century Genoese castle on an island in Şile.^[11] The castle was renovated in 2015, sparking criticism that the work had made it resemble the cartoon character SpongeBob SquarePants or an illustration from the video game Minecraft.^[12] The tomb of a Muslim saint, Kum Baba, is on a tree-covered hill above Şile.^[13] Along the coast near Şile, in the village of Kızılcaköy, is a cave which, according to a local myth, is said to be the scene of events in the Anabasis of Xenophon. Şile is also known for Şile cloth, a crimped-looking, light, see-through cotton fabric, made on the Şile coast, sold in many shops in the town and sent to the bazaars of Istanbul.^[14] A fair is held in the town to promote Şile cloth every summer.^[15][16] The largest campus of Işık University is located in Şile.

Şile is a part of Istanbul public transport system (İETT). There is a bus from Harem via Üsküdar (located at the Anatolian side of Istanbul) to Şile (İETT Lines 139 and 139A).

Şile's climate is humid subtropical according to the Köppen and Trewartha climate classification, though until recently, the town was in the oceanic zone.^[17] Şile's climate is marked by high humidity. It is in plant hardiness zone 8b, and AHS heat zone 2.^[18]

Şile is twinned with:^[22]

• Idstein, Germany^[23]
• Barcaldin, Australia
• Cazin, Bosnia and Herzegovina