Aileu district is located 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 50.6h/km2. The capital of the district is also named Aileu, is situated in the Mantane River basin 47 km by road from Dili, and at an altitude of 913m. The topography is mountainous, with spot heights ranging between 350 to 1500 metres above sea level.
The district is reported to have two agro-climatic zones: upland and highland. These zones are represented throughout the sub-districts. Local farmers divide the year into four distinct seasons, namely the wet season, which runs from mid-October to April, the cold season in May and June, the windy season in July and August, and the dry season from mid-August to mid-October. Average temperatures throughout the year are significantly lower than the coastal regions, with an extreme high of 29ºC and a nighttime extreme low of 4ºC. Humidity is also much lower than at the coast.