Assesse (French pronunciation: [a.sɛs]) is a Belgian municipality located in the Walloon province of Namur. It is composed of the villages of Assesse, Courrière, Crupet, Florée, Maillen, Sart-Bernard, and Sorinne-la-Longue. On January 1, 2006, Assesse had a total population of 6,252. The total area is 78.16 km² which gives a population density of 80 inhabitants per km².
The village of Crupet is noted for its grotto dedicated to Saint Anthony of Padua, the Château de Crupet, a moated medieval donjon, and its windmills.