Erdek (formerly Artàke, ) is a town and district of Balikesir Province in the Marmara region of Turkey. The population was 34000 in 2010. Located on the north coast of Gulf of Erdek at the south of the Sea of Marmara, Erdek is known as a holiday destination that is popular among domestic tourists. The area has a rugged geology and topography and evergreen wooded areas. There are also large olive groves. The mayor is Hüseyin Sari (CHP).