Until the reorganisation of the Municipalities of Belgium 1977, Waulsort was a municipality in its own right.
The Benedictine Waulsort Abbey was founded here in 946. It was dissolved in 1793, during the French Revolution. It was chiefly known as the owner, from the 10th century until its dissolution, of the Lothar Crystal.
Waulsort is on the river Meuse and is the location of a weir with a by-pass lock.