Fauvillers has 2,281 inhabitants across 74.8 km². The average age is 37, and women make up 50.5% of the population. Home ownership stands at 68%. Average net income is €17,991 per person per year, and households have an average of 1.4 cars. The main nationalities are Belgian (94.5%), French (1.9%), Luxembourgish (1.1%), Portuguese (0.4%), Dutch (0.3%), Italian (0.3%), Polish (0.3%) and other (1%).
The housing stock is predominantly made up of houses: 98.1% of dwellings are houses and 1.9% are apartment buildings. Open-type houses, farms and castles account for 68.2% of buildings; semi-closed houses 21.1%, closed houses 4.9%, other building types 3.2%, buildings and flat blocks 1.8%, and commercial houses 0.8%. The average building dates from 1936, and homes have an average of 6.8 rooms. There are currently 2 houses for sale, at an average price of €312,000. The listed prices range from €249,000 to €375,000.
The A26 / E25 entrance, on the Liège–Bastogne–Neufchâteau route, is 10 minutes by car from the town centre. The A4 / E411–E25, connecting Brussels, Namur, Arlon and Luxembourg City, is 13 minutes away by car. Local main roads include CR 315, N825 and N848. TEC bus services include lines 2/2 (Bastogne–Villers-La-Bonne-Eau), 2 (Jambes (Amée)–Saint-Servais (Beau-Vallon)), 60 (Saint-Hubert–Neufchâteau–Martelange), 80 (Namur station–Jambes (La Sauge)) and E69 (Liège–Bastogne–Arlon). Stations listed for the area are Habay, Neufchâteau, Marbehan, Bastenaken-Zuid / Bastogne-Sud and Bastenaken-Noord / Bastogne-Nord.
Families have access to 2 nurseries, 3 nursery schools and 3 primary schools; there is no secondary school in the municipality. The listed nursery examples are La Fée Clochette and Martine Noel, and the school examples include Ecole Communale Fondamentale. Fauvillers has 44 firms in mixed farming, 14 in landscape service activities, 11 in logging, 11 in hairdressing and other beauty treatment, 9 in joinery installation and 5 in business and management consultancy. Liège Airport is 72 minutes away by car or 216 minutes by public transport. No shared bicycles, shared cars or known EV charging stations are listed in the municipality. No supermarkets or shops are specified in the available local information.