Jagarzewo [jaɡaˈʐɛvɔ] is a village in the administrative district of Gmina Janowo, within Nidzica County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 14 kilometres (9 mi) east of Nidzica and 49 km (30 mi) south of the regional capital Olsztyn.