Sint-Genesius-Rode is a municipality in the province of Flemish Brabant, in the Flemish region of Belgium. The municipality only comprises the town of Sint-Genesius-Rode proper, and lies between Brussels and Waterloo in Wallonia. On January 1, 2008, Sint-Genesius-Rode had a total population of 18,021. The total area is 22.77 km2, which gives a population density of 791/km2.