In Baelen, 4,454 people live within a municipal area of 85.6 km². Residents have an average age of 40, and 72% own their homes. Average annual net income per capita is €18,551, while households own about 1.4 cars. The population is 92.2% Belgian, 3.4% German, 0.9% French, 0.4% Dutch, 0.4% Spanish, 0.4% Italian, 0.3% Moroccan and 2% other nationalities. Men make up 50.1% of residents.
Apartment buildings account for 13.2% of Baelen’s dwellings, with houses making up 86.8%. Across the building stock, 13% are buildings and apartment blocks, 47.6% open-type houses, farms and castles, 28.6% semi-detached houses, 9.4% closed-type houses, 1.1% other building types and 0.3% commercial houses. Buildings date from around 1946 on average, and the average number of rooms is about 6. There is 1 flat for rent, listed at €900 per month; the recorded highest and lowest monthly rents are both €900.
The centre is a 3-minute drive from an entrance to the A3 / E25 - E40 - E42, serving Brussels, Leuven, Liège and Eupen, with onward access to Aachen. The A27 / E42 access is 11 minutes away by car, on the route towards Battice, Verviers, Malmedy and Sankt-Vith and onward to Bitburg. The N61, N68, N620 and N629 provide further road links. TEC bus lines serving Baelen include 394, 710, 723, 724 and 725. Nearby railway stations are Dolhain-Gileppe, Welkenraedt, Eupen, Verviers-Paleis / Verviers-Palais and Verviers-Centraal / Verviers-Central.
There are 2 nurseries, 3 nursery schools and 3 primary schools in the municipality, including Ecole Fondamentale Communale De Membach and Ecole Communale Fondamentale De Baelen. Baelen has no secondary school. Its listed businesses include 20 hairdressing and beauty-treatment companies, 17 mixed-farming businesses, 17 joinery-installation businesses and 16 restaurants and mobile food-service firms. Shared bicycles and shared cars are not available in the municipality, and there is no known EV charging station. Liège Airport is 28 minutes away by car or 100 minutes by public transport.