Marianówek [marjaˈnuvɛk] is a village in the administrative district of Gmina Dzierżoniów, within Dzierżoniów County, Lower Silesian Voivodeship, in south-western Poland. Prior to 1945 it was in Germany.

It lies approximately 12 km (7 mi) east of Dzierżoniów, and 51 km (32 mi) south-west of the regional capital Wrocław.