Klimaszewnica [klimaʂɛvˈnit͡sa] is a village in the administrative district of Gmina Radziłów, within Grajewo County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 10 kilometres (6 mi) north-east of Radziłów, 21 km (13 mi) south of Grajewo, and 60 km (37 mi) north-west of the regional capital Białystok.