Ostrołęka County
Ostrołęka County is a unit of territorial administration and local government in Masovian Voivodeship, east-central Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat is the city of Ostrołęka, although the city is not part of the county. The only town in Ostrołęka County is Myszyniec, which lies north of Ostrołęka.
The county covers an area of. As of 2019 its total population is 88,717, out of which the population of Myszyniec is 3,408 and the rural population is 85,309.