Troszyn, Masovian Voivodeship
Troszyn  is a village in Ostrołęka County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina (administrative district) called Gmina Troszyn. It lies approximately  east of Ostrołęka and  north-east of Warsaw. References

Villages in Ostrołęka County
Łomża Governorate
Białystok Voivodeship (1919–1939)
Warsaw Voivodeship (1919–1939)