The Isthmus of Perekop (; translit. Perekops'kyy pereshyyok; ; translit. Perekopskiy peresheek , ) is the narrow, wide strip of land that connects the Crimean Peninsula to the mainland of Ukraine. The isthmus is located between the Black Sea to the west and the Sivash to the east. The isthmus takes its name from the Tatar fortress of Perekop.