Southeast Aceh Regency (Indonesian: Kabupaten Aceh Tenggara) is a regency in the Aceh special region of Indonesia. It is located on the island of Sumatra. The regency covers an area of 4,231.41 square kilometres and according to the 2010 census had a population of 179,010 people; the latest official estimate (as at 2014) is 188,461. The seat of the regency government is at Kutacane. In 1974, the Southeast Aceh Regency was separated from the Central Aceh Regency; however in 2002 the northern part of this regency was itself split away to form the new Gayo Lues Regency. The main commodities produced in the regency are palm oil, cacao, coconut, coffee, nutmeg, walnut, and pachouli oil  The main rivers are the Alas River and the Butan River. It contains the Leuser Ecosystem.
The original inhabitants of this regency are the Alas people. They use Alas language and live in under the customs (adat). However, the S.E. Aceh Regency has become very diverse due to migration from other regencies of Aceh and beyond. Although this Regency is part of Aceh province, Aceh tribe (eastern coast tribe) does not dominate this place.
Here are some other tribes other than Alas communing in the regency:
Some people are still new at the Regency and do not make majority, such as people from Palembang.