There are 10,478 inhabitants in Estaimpuis, spread across 32.1 km². The average age is close to 40, and women make up 50.9% of the population. Homeowners account for 72% of inhabitants, while average net income is €16,808 per year. Residents are 66.8% Belgian and 32% French; the remaining recorded shares are 0.4% Italian, 0.1% Romanian, 0.1% Portuguese, 0.1% Moroccan, 0.1% German and 0.5% other nationalities.
Apartment buildings represent 2.9% of Estaimpuis’s building stock, against 97.1% houses. The breakdown by building type records 2.8% buildings and flat blocks, 32.4% open-type houses, farms and castles, 31.6% semi-detached houses, 30.5% closed-type houses, 2.3% commercial houses and 0.3% other types. The average home has 5.7 rooms, and buildings date from around 1937 on average. There are currently 0 flats for rent, so there is no current rental price range; the supplied monthly price figures are €0 at both the high and low ends. For comparison within the local market, 3 flats are for sale, averaging €140,667 and priced from €105,000 to €168,000.
Road access includes the A17/E403, 3 minutes from the centre by car, and the A14/E17, 11 minutes away. The first links Brugge, Kortrijk and Tournai; the second runs towards Antwerpen, Sint-Niklaas, Gent, Kortrijk and Lille. The D 206, N510, N511 and N512 are also main routes. Bus services listed are TEC Line 1, Mons–Saint-Ghislain, and TEC Line 2, Mons–Dour. Nearby stations are Herseaux, Moeskroen/Mouscron, Moeskroen-Grens/Mouscron-Frontiere, Roubaix and Tourcoing. The municipality has 5 nurseries, 6 nursery schools, 6 primary schools and a secondary school, Centre Educatif Mitterrand Estaimpuis. Named school examples include Ecole Fondamentale Communale Estaimbourg - Evregnies, Ecole Fondamentale Communale D'Estaimpuis, Ecole Fondamentale Saint-Charles Luingne and Ecole Communale Fondamentale De Néchin.
For groceries, there are 1 Trafic and 1 Intermarché supermarket. No shared bicycle or shared-car service is listed for Estaimpuis, and no EV charging station is known there. Wevelgem Airport is 13 minutes away by car, with a public-transport journey of 96 minutes. The municipality averages 1.2 cars per household.