Zakrzewko [zaˈkʂɛfkɔ] is a village in the administrative district of Gmina Kozłowo, within Nidzica County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) south-east of Kozłowo, 13 km (8 mi) south-west of Nidzica, and 59 km (37 mi) south of the regional capital Olsztyn.