Aceh is the westernmost province of Indonesia. It is located on the northern end of Sumatra island, with Banda Aceh being its capital and largest city. It is bordered by the Indian Ocean to the west, Strait of Malacca to the northeast, as well bordering the province of North Sumatra to the east, its sole land border, and shares maritime borders with Malaysia and Thailand to the east, and Andaman and Nicobar Islands of India to the north. Granted special autonomous status, Aceh is a religiously conservative territory, with the majority of its population being Muslim; it is the only Indonesian province to officially integrate Islamic law. There are ten indigenous ethnic groups in this region, the largest being the Acehnese people, accounting for approximately 70% of the region's population of about 5.55 million people in mid-2024. Its land area spans 56,839.09 km2.