Dłużniewo [dwuʐˈɲɛvɔ] is a village in the administrative district of Gmina Baboszewo, within Płońsk County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) north-east of Baboszewo, 10 km (6 mi) north of Płońsk, and 72 km (45 mi) north-west of Warsaw.