Dłużek-Kolonia [ˈdwuʐɛk kɔˈlɔɲa] is a settlement in the administrative district of Gmina Lubsko, within Żary County, Lubusz Voivodeship, in western Poland. It lies approximately 4 kilometres (2 mi) south-west of Lubsko, 20 km (12 mi) north-west of Żary, and 45 km (28 mi) south-west of Zielona Góra.