Sarnowo [sarˈnɔvɔ] is a village in the administrative district of Gmina Lidzbark Warmiński, within Lidzbark County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) north-east of Lidzbark Warmiński and 41 km (25 mi) north of the regional capital Olsztyn.