Erdek is a town on the coast of Southern Marmara Region in Turkey. It's the principal town on the Kapıdağ Peninsula, with a navy base and a straggling resort strip: in 2012 the district population was 32,958. This page also briefly describes other places on the peninsula.
Kapıdağ Peninsula was one of the Marmara islands until about 2000 years ago. Earth tremors may have lifted the bedrock, and the channel silted up and became a tombola then a broad isthmus. Eventually some enterprising ruler built a road across - Alexander the Great is one suggestion. Its city of Cyzicus, 5 km east of present-day Erdek, was a major port but abandoned around 440 AD.
Erdek in the 1880s had about its present population size, mostly Greek, but these were deported after Turkish independence in 1923. Erdek and the peninsula became a beach resort for domestic tourism. It remains so even though the Turks now venture further for their holidays, as it's within a day's drive from Istanbul. It's also a ferry port for the Marmara islands.
For intercity routes travel via Bandırma, which has fast ferries from Istanbul, buses from other cities such as Bursa, and a train from Izmir. Frequent minibuses take 20 min from Bandırma to Erdek: they'll probably drop you at the town's main roundabout 300 m north of the ferry port.
Erdek ferry port 📍 has ferries to the Marmara islands. Gestaş car ferry sails twice a day to Balikli on Paşalimani island (1 hour) then makes a circuit of Avşa, Ekinlik and Marmara Island, so timings depend which way round it goes. Marmara RoRo sails five times a day from Tekirdağ Barbaros on the far mainland coast, with some ferries calling at the islands. There are no direct ferries to Erdek from Istanbul but you can island-hop via Marmara.
You can reach Kyzikos by the minibuses along the highway to Bandırma. These also connect the nearer beach resorts, but you need your own wheels around the peninsula.
The main beach stretches northwest.
Lots of small stores. Bim at the central roundabout is open daily 09:00-21:00.
Two bars by the port are Kafkas and Ömür.
Erdek has two strips for camping and basic pansiyon accommodation. East is Düzler, along the highway from Kyzikos. Places here include Aldırmaz'ın, Camping Kapıdağ, Pınar Hotel, Mysia Beach, Göktur Camping, Cumhuriyet Camping, Ipek (below) and Abant (below). This area is near the navy base and anywhere signposted TSK is military, Türk Silahlı Kuvvetleri, where you're less than welcome.
The larger strip is along the coast northwest, with dozens of places.
There is 4G from all Turkish carriers in Erdek, its highway approach from Bandırma, and along the south coast roads of the peninsula. The Vodafone signal reaches Turan but there's otherwise no coverage on the north coast. As of March 2022, 5G has not rolled out in Turkey.
From Erdek, there are regular ferries to Marmara Islands (takes about 1hr 45min) and further out to Tekirdağ (4hrs) which is located on the opposite coast of the Sea of Marmara.
Primary administrative division