Opwijk (Dutch pronunciation: [ˈɔpʋɛik]) is a municipality located in the Belgian province of Flemish Brabant.

The municipality comprises the towns of Mazenzele and Opwijk proper.

On January 1, 2012, Opwijk had a total population of 13,990.

The total area is 19.69 km2 which gives a population density of 690 inhabitants per km2.

This Flemish Brabant location article is a stub.