Olen (Dutch pronunciation: [ˈoːlə(n)]) is a municipality located in the Belgian province of Antwerp.

The municipality comprises three towns, situated on a south–north axis: In 2021, Olen had a total population of 12,600.

In the 1920s and 1930s the Union Minière du Haut Katanga company, operating in the then Belgian colony of Congo, had a virtual monopoly of the world uranium market (holding most of the deposits known at the time).

[3][4] Some 1200 tonnes of uranium stored at the Olen refinery were captured by the Germans during the invasion and occupation of Belgium in 1940, and only recovered by US troops at the end of World War 2.

This Antwerp Province location article is a stub.