Dłużniewo Duże [dwuʐˈɲɛvɔ ˈduʐɛ] is a village in the administrative district of Gmina Staroźreby, within Płock County, Masovian Voivodeship, in east-central Poland. It lies approximately 8 kilometres (5 mi) north-east of Staroźreby, 29 km (18 mi) north-east of Płock, and 80 km (50 mi) north-west of Warsaw.