Great Aceh Regency is a regency of the Indonesian province of Aceh. The regency covers an area of 2,903.49 square kilometres and had a population of 351,418 at the 2010 Census, 391,870 at the 2015 census and 405,535 at the 2020 Census; the official estimate as at mid 2023 was 435,298. The Regency is located at the northwest tip of Sumatra island and surrounds the provincial capital of Banda Aceh, many suburbs of which lie within the Regency.