Sancaktepe is a municipality and district of Istanbul Province, Turkey. Its area is 63 km², and its population is 489,848. In 2008 the district San…Sancaktepe is a municipality and district of Istanbul Province, Turkey. Its area is 63 km², and its population is 489,848. In 2008 the district Sancaktepe was created from parts of the districts Kartal and Ümraniye. The urban part of the new district was established as a municipality. At the 2013 Turkish local government reorganisation, the rural part of the district was integrated into the municipality, the villages becoming neighbourhoods.