Gmina Biskupiec is an urban-rural gmina (administrative district) in Olsztyn County, Warmian-Masurian Voivodeship, in northern Poland. Its seat is the town of Biskupiec, which lies approximately 31 kilometres (19 mi) east of the regional capital Olsztyn. The gmina covers an area of 290.38 square kilometres (112.1 sq mi), and as of 2006 its total population is 19,018, of which the population of Biskupiec is 10,348, and the population of the rural part of the gmina is 8,670.