Silivri (ancient Selymbria) is a city and a district in Istanbul Province along the Sea of Marmara in Turkey, outside the urban core of Istanbul, containing many holiday and weekend homes for residents of the city. The largest settlement in the district is also named Silivri, The district consists of 8 towns and 18 villages, and its population is 155,923 (2013 census). 75,702 in the city of Silivri, the remaining in the surrounding towns and villages – listed below. Established in 2008.