Waterloo is a Walloon municipality located in the province of Walloon Brabant. On 30 September 2011, Waterloo had a total population of 29,706. The total area is 21.03 km² which gives a population density of 1,413 inhabitants per km². Nearly one fifth of the current registered population (5,640 inhabitants) are non-Belgian, many of whom work for institutions or companies in Brussels, a political centre of the European Union. read more…