Zagrzewo [zaˈɡʐɛvɔ] is a village in the administrative district of Gmina Nidzica, within Nidzica County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) south-east of Nidzica and 50 km (31 mi) south of the regional capital Olsztyn.