Brzezinna Góra [bʐɛˈʑinna ˈɡura] is a village in the administrative district of Gmina Nowy Duninów, within Płock County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) south-west of Nowy Duninów, 19 km (12 mi) west of Płock, and 113 km (70 mi) west of Warsaw.