Affligem (Dutch pronunciation: [ˈɑfliɣɛm] ⓘ; anciently written Afflighem) is a municipality located some 20 km (12 mi) west-north-west of Brussels in the Belgian province of Flemish Brabant, not far from the city of Aalst and the important railway junction of Denderleeuw.

The total area is 17.70 km2 (7 sq mi), giving a population density of 676 inhabitants per km2.

The abbey of Affligem was founded around 1074, making it one of the oldest breweries and businesses in Belgium.

[2] The label "anno 1074" on the Affligem beer bottles is based on Abbey's founding.

The brand name is used under license from the monks of Affligem, by the Op-Ale brewery in the neighbouring village of Opwijk.