Szeroki Bór [ʂɛˈrɔki ˈbur] (German: Breitenheide) is a village in the administrative district of Gmina Ruciane-Nida, within Pisz County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 8 kilometres (5 mi) east of Ruciane-Nida, 10 km (6 mi) north-west of Pisz, and 79 km (49 mi) east of the regional capital Olsztyn.

The village has a population of 300.