Pendik is a municipality and district of Istanbul Province, Turkey. Its area is 190 km2, and its population is 750,435 (2022). It is on the Asian side between Kartal and Tuzla, on the Marmara Sea. It also neighbours Sultanbeyli, Sancaktepe and Çekmeköy from northwest, Şile from north and Gebze from northeast. The district is home to the Sabiha Gökçen International Airport.

Kartal is a municipality and district of Istanbul Province, Turkey. Its area is 38 km2, and its population is 483,418 (2022). It is located on the Asian side of the city, on the coast of the Marmara Sea between Maltepe and Pendik.