Popielżyn Górny [pɔˈpjɛlʐɨn ˈɡurnɨ] is a village in the administrative district of Gmina Joniec, within Płońsk County, Masovian Voivodeship, in east-central Poland. It lies approximately 16 kilometres (10 mi) east of Płońsk and 51 km (32 mi) north-west of Warsaw.