Królewo [kruˈlɛvɔ] is a village in the administrative district of Gmina Joniec, within Płońsk County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) north of Joniec, 13 km (8 mi) east of Płońsk, and 55 km (34 mi) north-west of Warsaw.