Gmina Troszyn is a rural gmina (administrative district) in Ostroà ÂÃÂka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Troszyn, which lies approximately east of Ostroà ÂÃÂka and north-east of Warsaw.
The gmina covers an area of , and as of 2006 its total population is 4,880 (4,945 in 2011).
Gmina Troszyn contains the villages and settlements of Aleksandrowo, Borowce, Budne, Choromany, Chrostowo, Chrzczony, Dàbek, Dzbenin, Grucele, Janochy, Kamionowo, Kleczkowo, Kurpie Dworskie, Kurpie Szlacheckie, à Âàtczyn Szlachecki, à Âàtczyn Wà Âoà Âciaà Âski, Mieczki-Abramy, Mieczki-Poziemaki, Mieczki-Ziemaki, Milewo Wielkie, Milewo-à Âosie, Milewo-Tosie, Ojcewo, OpÃÂchowo, Puchaà Ây, RabÃÂdy, Radgoszcz, Repki, Rostki, Sawaà Ây, Siemiàtkowo, Stare Janki, Troszyn, Trzaski, Wysocarz, Zamoà ÂÃÂ, Zapieczne, Zawady, à »mijewo-Zagroby, à »mijówek Wà Âoà Âciaà Âski, à »mijówek-Mans and à »yà ºniewo.
Gmina Troszyn is bordered by the gminas of Czerwin, Miastkowo, Rzekuà  and à Âniadowo.