Borek [ˈbɔrɛk] is a settlement in the administrative district of Gmina Ruciane-Nida, within Pisz County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 12 kilometres (7 mi) south-west of Ruciane-Nida, 24 km (15 mi) west of Pisz, and 70 km (43 mi) east of the regional capital Olsztyn.