Rixensart is a Walloon municipality located in the Belgian province of Walloon Brabant. On January 1, 2006 Rixensart had a total population of 21,355. The total area is 17.54 km² which gives a population density of 1,217 inhabitants per km².
The formerly separate municipalities of Genval and Rosières now form part of Rixensart. Genval-les-Bains is a local beauty spot, a 100-year old lake with a fountain, and framed by trees, houses and restaurants. Rixensart is home to the beautiful private-owned Chateau de Rixensart.
Rixensart is served by two railway stations (at Rixensart and at Genval), connecting it with Brussels to the North and Louvain-la-Neuve to the South. The new arrival of the Brussels RER, will improve both train stations and upgrade the number of trains going from Brussels to Namur to 4 per hour. This will also bring more people to the commune to live. The commune is now classified as a commuter town due to its proxmidity to Brussels, the RER and the E411 Motorway.