Nadbiel [ˈnadbjɛl] is a village in the administrative district of Gmina Poświętne, within Wołomin County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) north-west of Poświętne (the gmina seat), 9 km (6 mi) east of Wołomin, and 30 km (19 mi) north-east of Warsaw.