Population in Ostrołęcki 13 indicators covering population for Ostrołęcki. IndicatorLatest Year10-yr change Rank Assumptions for fertility rates by age, type of projection and NUTS 3 1.71 Number 2100 up 1.2% 670th Demographic balances and indicators by type of projection and NUTS 3 r 3,392 2100 down 9.7% 461st Live births (total) by NUTS 3 region 2,866 Number 2024 down 29.1% 956th Population density by NUTS 3 region 55.4 Persons per square kilometre 2024 down 6.9% 1518th Population on 1 January by broad age group, sex and NUTS 3 region 357,441 Number 2025 down 7.1% 950th Population change - Demographic balance and crude rates at regional le -1,235 2024 down 12.9% 1824th Population on 1st January by age group, sex, type of projection and NU 226,813 Person 2100 down 4.0% 520th Population structure indicators by type of projection and NUTS3 region 86.3 2100 down 4.4% 566th Assumptions for total fertility rates, type of projection and NUTS 3 r 1.54 Number 2095 up 1.4% 705th Projected life expectancy at birth, by sex, type of projection and NUT 86.5 Year 2095 up 2.1% 1030th Demographic balances by type of projection and NUTS3 region 16,066 2095 down 9.0% 482nd Population on 1 January by age group, sex and NUTS 3 region 357,441 Number 2025 down 7.1% 949th Live births by age group of the mothers and NUTS 3 region 2,866 Number 2024 down 29.1% 956th