Sint-Katelijne-Waver (, old spelling: Kathelijne-Waver, French Wavre-Sainte-Catherine) is a municipality located in the Belgian province of Antwerp. The municipality comprises the towns of Onze-Lieve-Vrouw-Waver and Sint-Katelijne-Waver proper. On January 1, 2006 Sint-Katelijne-Waver had a total population of 19,577. The total area is 36.12 km² which gives a population density of 542 inhabitants per km². Roosendael a ruined relic of a cistercian abbey is situated here and host today a youth and touristic centre with pleasant walkways.