Waalwijk (Dutch pronunciation: [ˈʋaːlʋɛik] ⓘ) is a municipality and a city in the southern Netherlands.

The villages of Capelle, Vrijhoeve-Capelle, Sprang (the former municipality of Sprang-Capelle) and Waspik together with the city of Waalwijk form the municipality of Waalwijk.

The city has an old town center, which has recently been modernized.

The professional football team RKC plays in Waalwijk.

Waalwijk is also known for an event in the city and surroundings: the "80 van de langstraat", held every September, in which a few thousand people make an 80-km walk through all towns that are part of the Langstraat region.