It lies in the highlands to the south of Dili, the national capital. It has a population of 44.325 (Census 2010) and an area of 729 km2, with a demographic density of 50,6 h/km2. The capital of the district is also named Aileu. This district used to belong to Dili municipality and was only given its autonomy during the last years of the Portuguese administration. Aileu district comprises the subdistricts of Aileu, Laulara, Liquidoe and Remexio.