| Gmina Troszyn | |
| Other Name: | Troszyn Commune |
| Settlement Type: | Gmina |
| Total Type: | Total |
| Pushpin Map: | Poland |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Subdivision Type2: | County |
| Subdivision Name2: | Ostrołęka County |
| Area Total Km2: | 156.31 |
| Population Total: | 4945 |
| Population As Of: | 2011[1] |
| Population Density Km2: | auto |
| Coor Pinpoint: | Troszyn |
| Coordinates: | 53.0303°N 21.7358°W |
| Seat: | Troszyn |
Gmina Troszyn is a rural gmina (administrative district) in Ostrołęka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Troszyn, which lies approximately 13km (08miles) east of Ostrołęka and 1040NaN0 north-east of Warsaw.
The gmina covers an area of 156.31km2, 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, Dąbek, Dzbenin, Grucele, Janochy, Kamionowo, Kleczkowo, Kurpie Dworskie, Kurpie Szlacheckie, Łątczyn Szlachecki, Łątczyn Włościański, Mieczki-Abramy, Mieczki-Poziemaki, Mieczki-Ziemaki, Milewo Wielkie, Milewo-Łosie, Milewo-Tosie, Ojcewo, Opęchowo, Puchały, Rabędy, Radgoszcz, Repki, Rostki, Sawały, Siemiątkowo, Stare Janki, Troszyn, Trzaski, Wysocarz, Zamość, Zapieczne, Zawady, Żmijewo-Zagroby, Żmijówek Włościański, Żmijówek-Mans and Żyźniewo.
Gmina Troszyn is bordered by the gminas of Czerwin, Miastkowo, Rzekuń and Śniadowo.