Koyun Island ( tr, Koyun Adası, literally "Sheep Island") is a Turkish island in the

Sea of Marmara The Sea of Marmara,; grc, Προποντίς, Προποντίδα, Propontís, Propontída also known as the Marmara Sea, is an inland sea located entirely within the borders of Turkey. It connects the Black Sea to the Aegean Sea via t ...

. At it is a part of

Erdek Erdek (formerly known as ''Artàke'', el, Αρτάκη) is a town and district of Balıkesir Province in the Marmara region of Turkey. The population was 34,000 in 2010. Located on the Kapıdağ Peninsula, on the north coast of the Gulf of Erd ...

ilçe The 81 provinces of Turkey are divided into 973 districts (''ilçeler''; sing. ''ilçe''). In the early Turkish Republic and in the Ottoman Empire, the corresponding unit was the ''kaza''. Most provinces bear the same name as their respectiv ...

(district) of Balıkesir Province. It is situated between the better known islands of

Avşa Island Avşa Island ( tr, Avşa Adası) or Türkeli is a Turkish island in the southern Sea of Marmara with an area of about . It was the classical and Byzantine Aphousia ( el, Ἀφουσία or Ἀφησιά) and was a place of exile during the Byzant ...

and

Paşalimanı Island Paşalimanı Island ( tr, Paşalimanı Adası), formerly Halone ( gr, Ἁλώνη), is a small island in the southern Sea of Marmara in Turkey. The island is the fourth biggest island (21.3 km2) of Turkey and administratively belongs to the Erdek ...

. The island is a long island from north to south. Its total area is about . There are only a few summer houses on the otherwise uninhabited island.Turkçe bilgi page
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References

{{Islands of Turkey Islands of the Sea of Marmara Islands of Turkey Islands of Balıkesir Province Erding (district)