Territory of Ostrowski County 2025

In 2024, Ostrowski county ranked 208 nationally among Poland's 380 counties by area, in the top 30% of largest counties. Covered 1,218 km² (121,772 ha). Within Masovian province, ranked 26 of 42 counties. Contained 11 municipalities.

Official GUS territorial statistics for Ostrowski county and its 11 municipalities within Masovian province.