Han-sur-Lesse is a village of Wallonia and a district of the municipality of Rochefort, located in the province of Namur, Belgium. Han-sur-Lesse was called Ham from 1139, Ham Han Sur Lesche, from 1266, Han Sur Lece from 1465 and Ham sur lez from 1528, by which time it had 14 families. The village then declined, with plague, epidemics and Franco-Spanish wars, but by 1766, there were 62 villagers. In 2021 the population was about 1,000.