Żarnówka [ʐarˈnufka] is a village in the administrative district of Gmina Lubowidz, within Żuromin County, Masovian Voivodeship, in east-central Poland. It lies approximately 10 kilometres (6 mi) south-west of Lubowidz, 12 km (7 mi) west of Żuromin, and 129 km (80 mi) north-west of Warsaw.