Kasterlee is a municipality located in the Belgian province of Antwerp. The municipality comprises the towns of Kasterlee proper, Lichtaart and Tielen. On January 1st, 2004 Kasterlee had a total population of 17,767 (9,047 males and 8,720 females). The total area is 71.56 km² which gives a population density of 248.42 inhabitants per km².