Şile is a municipality and district of Istanbul Province, Turkey. Its area is 800 km, and its population is 43,464. Bordering Şile is the province o…Şile is a municipality and district of Istanbul Province, Turkey. Its area is 800 km, and its population is 43,464. Bordering Şile is the province of Kocaeli to the east and south, and Istanbul districts of Pendik to the south, Çekmeköy to the southwest, and Beykoz to the west. 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.