Londerzeel () is a municipality located in the Belgian province of Flemish Brabant. The municipality comprises the towns of Londerzeel proper, Malderen, Steenhuffel (home of Palm Breweries) and Sint-Jozef. On 1 January 2018, Londerzeel had a total population of 18,620. The total area is 36.53 km<sup>2</sup> which gives a population density of 510 inhabitants per km<sup>2</sup>.
Their football team is K. Londerzeel S.K.
Londerzeel has been twinned with Gladenbach (Germany) since 2010.