Cwaliny Duże [t͡sfaˈlinɨ ˈduʐɛ] is a village in the administrative district of Gmina Mały Płock, within Kolno County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 15 kilometres (9 mi) south of Kolno and 86 km (53 mi) west of the regional capital Białystok.