Kraainem (also unofficially known in French as 'Crainhem') is a municipality in the province of Flemish Brabant, in Flanders, one of the three regions of Belgium. The municipality only comprises the town of Kraainem proper. On January 1, 2006 Kraainem had a total population of 13,150. The total area is 5.80 km² which gives a population density of 2,266 inhabitants per km².
Kraainem is a municipality with language facilities within Flanders, where the sole official language is Dutch. However, in 1963, special 'language facilities' were given to French-speaking inhabitants, when those were still a minority. They can request official documents from the local administration in French. Today, a majority of the inhabitants are French-speaking.
Kraainem is one of the richest municipalities in Belgium.