Hala'ib Triangle

The Hala'ib Triangle (مثلث حلايب in Arabic, transliterated Muthāllath Ḥalāʾib) is an area of land measuring 20,580 square kilometres (7,950 sq mi) located on the Red Sea's African coast. The area, which takes its name from the town of Hala'ib, is created by the difference in the Egypt–Sudan border between the "political boundary" set in 1899 by the Anglo-Egyptian Condominium, which runs along the 22nd parallel north, and the "administrative boundary" set by the British in 1902, which gave administrative responsibility for an area of land north of the line to Sudan, which was an Anglo-Egyptian client at the time. With the independence of Sudan in 1956, both Egypt and Sudan claimed sovereignty over the area. Since the mid-1990s, Egypt has exercised de facto effective administration of the area as part of the Red Sea Governorate, following the deployment of Egyptian military units there in the 1990s, and has been actively investing in it.

The description of the area as a "triangle" is a rough generalization. Only the southern 290 kilometres (180 mi) demarcation, which follows latitude 22, is a straight line. While the whole area is north of the 22 degree line, a smaller area south of latitude 22, referred to as Bir Tawil, joins the Hala'ib Triangle at its westernmost point along the latitude line – neither Sudan nor Egypt claim Bir Tawil.

The area is sometimes referred to in Egypt as the "Sudan Government Administration Area" or SGAA.