Bireuën or Bireun is an Indonesian town, the seat of the Bireuën Regency government in the Aceh Special Territory of Sumatra. Bireuen is located at 5°12′18″N 96°42′06″E. The town covers an area of 16.91 km2, and it had a population of 44,604 at the 2010 Census and 47,670 at the 2020 Census; the official mid-2022 population estimate was 47,983.