Cantillon Brewery (Brasserie-Brouwerij Cantillon) is a small Belgian traditional family brewery based in Brussels and founded in 1900, notable for its lambic beers.

Cantillon Brewery brews lambic beers like kriek, faro, and gueuze in the traditional style. The brewery was founded in 1900 by Paul Cantillon, whose father was a brewer as well, and his wife, Marie Troch. As of 2011^[update], the owner is Jean van Roy, fourth-generation brewer at Cantillon. Since 1900 the only major change has been a shift to organic ingredients in 1999. In the traditional lambic style, beers (from 2/3 malted barley and 1/3 unmalted wheat) are spontaneously fermented, aged in oak, blended (from different batches and ages), and bottled, and then refermented for a year. Half of the brewery's production is gueuze; once a year a batch of kriek is made. For fruit-flavored beers, empty oak casks are filled with various fruits and macerated for three months to dissolve the fruits; young lambic is added to supply sugar for fermentation.