Aalst [aːɫst] is a village in the Dutch province of Gelderland. It is a part of the municipality of Zaltbommel, and lies about 12 km southeast of Gorinchem.
In 2005, the village of Aalst proper had 1950 inhabitants. The built-up area of the village was 0.32 km², and contained 525 residences. The statistical area "Aalst", which also includes the surrounding countryside, has a population of around 2020.
For a short while, Aalst was a separate municipality. In 1818, it became a part of the municipality of Poederoijen. According to the historian Van der Aa, there used to be an old castle here, but only a few remnants were left in the middle of the 19th century.