Arlon / Aarlen has a population of 29,858 within 119.1 km². Its average age is 39, and the population is 50.1% women. Home ownership is 63%, with average net income of €21,539 per person per year. Residents’ nationalities are Belgium (83.2%), France (4.8%), Portugal (2.8%), Italy (1.6%), Luxembourg (1.4%), Romania (1.3%), Spain (0.6%) and other countries (4.3%). Houses represent 69% of the municipality’s dwellings, compared with 31% in apartment buildings. There are about 6.3 rooms per dwelling on average, and the average building year is 1949. The building types include 26.3% open-type houses, farms and castles, 20.1% closed-type houses, 17.8% semi-closed-type houses, 28.8% buildings and flat blocks, and 2.8% commercial houses.
Only 2 houses are currently listed for rent. The average monthly rent is €1,575, and the listed range is €1,500 to €1,650 per month. The A4 / E411–E25, connecting Brussels, Namur, Arlon and Luxembourg City, is 4 minutes from the centre by car. The A28 / E411 towards Aubange, Athus and Longwy is 12 minutes away. Roads serving the municipality include the N4, N40, Route de La Gaichel, Rue de Hondelange and Rue de Barnich.
There are 36 bus lines with stops in Arlon / Aarlen. TEC line 16 runs between Virton, Athus and Arlon; urban services include line B to Callemeyn and line C to Semois. Stations in the area are Aarlen / Arel / Arlon, Viville, Stockem, Sterpenich-Frontiere and Kleinbettingen. Childcare and education facilities include 21 nurseries, 23 nursery schools, 22 primary schools and 6 secondary schools. Named examples are La Boîte À Malices, Pomme D’Api, Ecole Fondamentale Libre - Institut Notre-Dame, Ecole Communale De Waltzing, Ecole Fondamentale Annexée Arlon, Institut Sainte-Marie - Enseignement Secondaire and Institut Cardijn Lorraine - Enseignement Technique Et Professionnel.
The town’s shops include 3 Carrefour branches, plus 1 each of Trafic, Delitraiteur, Aldi, LIDL, Colruyt and Delhaize. For shared and lower-emission travel, there are 2 Cambio stations and 6 electric-vehicle charging stations; shared bicycles are not available. Liège Airport is 87 minutes away by car and 172 minutes by public transport. The average number of cars is 1.1 per household. House rentals are a small part of the current listing market, with 2 available at monthly rents between €1,500 and €1,650.