Ass is a municipality located in the Belgian province of Flemish Brabant. The municipality comprises the towns of Asse proper, Bekkerzeel, Kobbegem, Mollem, Relegem and Zellik. On January 1st, 2005 Asse had a total population of 28,838. The total area is 49.64 km² which gives a population density of 580.95 inhabitants per km². A municipality or general-purpose district (compare with: special-purpose district) is an administrative local area generally composed of a clearly defined territory and commonly referring to a city, town, or village government. ... Flemish Brabant is a province of Flanders, one of the three regions of Belgium. ... Square kilometre (US spelling: Square kilometer), symbol km², is an SI unit of surface area. ...