Brześć Kujawski[ˈbʐɛɕt͡ɕkuˈjafskʲi] is a town in the Kuyavian-Pomeranian Voivodeship. Formally a royal seat of Kujawy, the town has been the seat of one of two small duchies into which Kujawy has been temporarily divided. According to a census done on 31 December 2010, the town has a population of 4,603.