Kępiaste [kɛmˈpjastɛ] is a village in the administrative district of Gmina Pokrzywnica, within Pułtusk County, Masovian Voivodeship, in east-central Poland. It lies approximately 9 kilometres (6 mi) south of Pokrzywnica, 19 km (12 mi) south of Pułtusk, and 37 km (23 mi) north of Warsaw.