تنگه دانمارک (به دانمارکی: Danmarksstrædet) نام گذرگاهی آبی در بین گرینلند و ایسلند است که اقیانوس منجمد شمالی را به شمال اقیانوس اطلس متصل میسازد. این تنگه که بخشی از آن در مدار قطب شمال قرار دارد ۴۸۰ کیلومتر (در حدود ۳۰۰ مایل) درازا داشته و در باریکترین قسمت خود ۲۹۰ کیلومتر (۱۸۰ مایل) پهنا دارد.
The Denmark Strait (Danish: Danmarksstrædet) or Greenland Strait (Icelandic: Grænlandssund, 'Greenland Sound') is an oceanic strait between Greenland to its northwest and Iceland to its southeast. The Norwegian island of Jan Mayen lies northeast of the strait.
The strait connects the Greenland Sea, an extension of the Arctic Ocean, to the Irminger Sea, a part of the Atlantic Ocean. It stretches 480 kilometres (300 mi) long and 290 kilometres (180 mi) wide at its narrowest, between Straumnes, the northwestern headland of the Westfjords peninsula of Hornstrandir, and Cape Tupinier on Blosseville Coast in East Greenland). The official International Hydrographic Organization (IHO) delineation between the Arctic and the North Atlantic Oceans runs from Straumnes to Cape Nansen, 132 km (82 miles) southwest of Cape Tunipier. From Straumnes to Cape Nansen the distance is 336 km (209 miles).
The narrow depth, where the Greenland–Iceland Rise runs along the bottom of the sea, is 191 metres (625 ft). The cold East Greenland Current passes through the strait and carries icebergs south into the North Atlantic. It hosts important fisheries.
Battle of the Denmark Strait
During World War II, the Battle of the Denmark Strait took place on 24 May 1941. The German battleship Bismarck sank the British battlecruiser HMS Hood, which exploded with the loss of all but three of its 1,418 crew; HMS Prince of Wales was seriously damaged in the engagement. Bismarck entered the Atlantic through the Strait, but damage sustained in the battle—combined with British aircraft search-and-destroy missions—led to its sinking three days later.