In Bernissart, 11,859 people live within a municipal area of 43.8 km². The average age is close to 41, while 72% of residents are homeowners and average annual net income is €16,482. Women represent 51.3% of the population. Residents are 90.3% Belgian, 4.4% Italian, 3.5% French, 0.2% Romanian, 0.2% Spanish, 0.2% Moroccan, 0.2% Algerian and 1% other. Houses account for 95% of homes and apartment buildings for 5%. The average dwelling has 5.9 rooms, and the average construction year of buildings is 1924. The building mix includes 35.8% closed-type houses, 30.1% semi-closed houses, 25.9% open-type houses, farms and castles, 4.8% buildings and flat blocks, 2.1% commercial houses and 1.3% other building types.
There is 1 house for rent. Its monthly rent is €1,325, which is also the stated lowest and highest rent for a house in Bernissart; the average is €1,325 per month. For comparison, 7 houses are for sale, with a stated average price of €297,092 and a range of €170,000 to €366,645. Main roads through the area include the N50, N60e, D 102, N505 and N506. By car from the centre, the A7 / E19 - E42 takes 11 minutes to reach, serving the direction of Halle, Nivelles and Mons and continuing towards Valenciennes in France. The A16 / E42, on the Mons–Tournai route, is 16 minutes away.
TEC buses connect Bernissart on line 78 between Saint-Ghislain and Péruwelz, line 80 between Blaton and Quevaucamps / Bernissart, line 81 between Ath and Blaton, line 86A between Leuze and Blaton, and E40 between Ath and Péruwelz. Stations in the area include Harchies, Blaton, Ville-Pommeroeul, Péruwelz and Quiévrain. There are 9 nurseries, 9 nursery schools and 9 primary schools locally, including Ecole Communale Pommeroeul - Ville-Pommeroeul and Ecole Fondamentale Libre Subventionnée. Bernissart has no secondary school. For everyday shopping, the town has 1 OKay and 1 Carrefour.
Households have an average of 1.2 cars. There is no known charging station in the municipality, and Bernissart does not have shared bicycles or shared cars. Wevelgem Airport is 39 minutes away by car; the public-transport journey takes 126 minutes. The current rental choice is limited to 1 house, listed at €1,325 per month.