Lubominek [lubɔˈminɛk] is a village in the administrative district of Gmina Nasielsk, within Nowy Dwór County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) north-west of Nasielsk, 22 km (14 mi) north of Nowy Dwór Mazowiecki, and 47 km (29 mi) north of Warsaw.