Tenneville has 2,832 inhabitants across 91.9 km². The average age is 41, and women make up 50.8% of the population. Residents are mainly homeowners: 76% own their homes. Average annual net income per person is €17,719. The population is 96.9% Belgian, 0.6% French, 0.5% Romanian, 0.5% Dutch, 0.3% Polish, 0.2% Spanish, 0.2% Iraqi and 0.8% from other countries. The current listings include 7 houses for sale, with an average asking price of €254,000. Prices range from €80,000 to €678,000.
Houses account for 87.7% of Tenneville’s dwellings, while apartment buildings account for 12.3%. Homes have an average of 6.5 rooms, compared with 6 across Belgium, and the buildings date on average from around 1942. Across all building types, 66.3% are open-type houses, farms or castles; 15.1% are semi-detached houses; 11.6% are buildings or blocks of flats; 4% are other types; 1.5% are closed-type houses; and 1.5% are commercial houses. The municipality has 1.3 cars per household on average. The A26/E25, on the Liège–Bastogne–Neufchâteau route, is 11 minutes by car from the centre. The A4/E411–E25 towards Brussels, Namur, Arlon and Luxembourg City is 31 minutes away. Local roads include the N4d, N89, N829, N843 and N889.
Bus services include TEC lines 1, 51, 53/2, 59 and E78. Their listed routes connect places including Jambes, Saint-Marc, Namur, Saint-Hubert, Champlon, La Roche, Bastogne and Marloie. No metro or tram service is listed. The nearest stations to the centre are Bastenaken-Zuid/Bastogne-Sud, Bastenaken-Noord/Bastogne-Nord, Grupont, Forrières and Poix-Saint-Hubert. For families, Tenneville has 6 nurseries, 3 nursery schools and 3 primary schools; there is no secondary school. The municipality has 1 Delhaize. No shared bicycles, shared cars or known EV charging stations are listed. Liège Airport is 56 minutes away by car or 160 minutes by public transport.