Lasne is a municipality of Wallonia located in the province of Walloon Brabant, Belgium, south east of Brussels.
In 2008, Lasne had a population of 14,043. The total area is 47.22 km² which gives a population density of 297 inhabitants per km². Lasne is the richest municipality in Wallonia, measured by the average taxable income of the inhabitants. It also has the lowest local taxes of any municipality in Belgium.
The municipality consists of the following districts: Couture-Saint-Germain, Lasne-Chapelle-Saint-Lambert, Maransart, Ohain, and Plancenoit.
Wikipedia https://en.wikipedia.org/wiki/Lasne
Coordinates 50°41'9.613" N 4°29'3.896" E