Gmina Olszewo-Borki is a rural gmina (administrative district) in Ostroà ÂÃÂka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Olszewo-Borki, which lies approximately 3 kilometres (2 mi) south-west of Ostroà ÂÃÂka and 99 km (61 mi) north-east of Warsaw.
The gmina covers an area of , and as of 2006 its total population is 9,505 (10,098 in 2011).
Gmina Olszewo-Borki contains the villages and settlements of Antonie, Biaà Âobrzeg Blià ¼szy, Biaà Âobrzeg Dalszy, Chojniki, Dobroà ÂÃÂka, DrÃÂà ¼ewo, Dziaà Âyà Â, Grabnik, Grabówek, Grabowo, Kordowo, Kruki, à Âazy, Mostówek, Mostowo, Nakà Ây, Nowa Wieà Â, Noà ¼ewo, Olszewo-Borki, Przystaà Â, Rataje, Rà ¼aniec, Stepna Stara, Stepna-Michaà Âki, Wyszel, Zabiele Wielkie, Zabiele-Piliki, Zabrodzie, à »ebry-Chudek, à »ebry-Ostrowy, à »ebry-Perosy, à »ebry-Sà Âawki, à »ebry-Stara Wieà Â, à »ebry-Wierzchlas, à »ebry-à »abin, à »eraà  Duà ¼y and à »eraà  Maà Ây.
Gmina Olszewo-Borki is bordered by the city of Ostroà ÂÃÂka and by the gminas of Baranowo, Krasnosielc, Lelis, Mà Âynarze, Rzekuà  and Sypniewo.