Şile is a city and district in Istanbul, Turkey. According to the 2007 census, the population of the district was 25,169, of which 9,831 lived in the city of Şile, 2,096 in the nearby town of Ağva (Yeşilçay) and 13,242 in surrounding villages. However, between June and September, the population rapidly increases because of the many residents of Istanbul who have summer houses in Şile.
The district of Şile is part of the province (il) of Istanbul, and the municipality of Şile is part of the metropolitan government (büyükşehir belediyesi) of Istanbul. 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. The boundaries of Şile were expanded by the addition of the village of Esenceli from Beykoz district in 1987. Şile consists of Şile, Yeşilvadi and Teke subdistricts, and 58 villages. The mayor is Can Tabakoğlu (AKP). Popular resort Ağva is also a part of Şile.