Ostrow Mazowiecka's 2026 population is now estimated at 20,825. In 1980, the population of Ostrow Mazowiecka was 17,500. Ostrow Mazowiecka experienced a decrease of -233 residents over the past year, marking an annual decline of -1.11%. These population values and projections come from Poland city series 1980-2023 via CityPopulation official attribution and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Warsaw | 1,863,578 | 0.04% |
| Krakow | 814,595 | 0.35% |
| Wroclaw | 674,966 | 0.06% |
| Lodz | 625,040 | -1.4% |
| Poznan | 526,051 | -0.77% |
| Gdansk | 489,402 | 0.14% |
| Szczecin | 378,651 | -0.9% |
| Lublin | 322,037 | -0.77% |
| Bydgoszcz | 310,283 | -1.68% |
| Bialystok | 287,899 | -0.43% |
| Katowice | 269,687 | -1.15% |
| Gdynia | 235,264 | -0.83% |
| Rzeszow | 199,382 | 0.36% |
| Czestochowa | 195,708 | -1.69% |
| Torun | 189,634 | -0.89% |
| Radom | 187,901 | -1.4% |
| Sosnowiec | 177,710 | -1.7% |
| Kielce | 175,608 | -1.24% |
| Gliwice | 163,944 | -1.19% |
| Olsztyn | 163,033 | -0.86% |
| Bielsko-Biala | 160,904 | -0.99% |
| Zabrze | 147,370 | -1.42% |
| Bytom | 139,856 | -1.82% |
| Zielona Gora | 137,342 | -0.38% |
| Rybnik | 126,676 | -1.08% |
| Ruda Slaska | 125,236 | -1.31% |
| Opole | 124,137 | -0.52% |
| Tychy | 117,910 | -1.14% |
| Elblag | 109,563 | -1% |
| Gorzow Wielkopolski | 108,517 | -1.99% |
| Dabrowa Gornicza | 108,447 | -1.5% |
| Plock | 106,273 | -1.5% |
| Koszalin | 105,028 | -0.16% |
| Tarnow | 98,606 | -1.48% |
| Chorzow | 95,425 | -1.74% |
| Wloclawek | 95,230 | -1.88% |
| Walbrzych | 94,434 | -1.99% |
| Kalisz | 89,134 | -1.45% |
| Legnica | 87,722 | -1.56% |
| Grudziadz | 85,412 | -1.24% |
| Jaworzno | 83,633 | -1.24% |
| Slupsk | 82,369 | -1.24% |
| Nowy Sacz | 78,993 | -0.57% |
| Jastrzebie-Zdroj | 78,343 | -1.63% |
| Siedlce | 73,735 | -0.7% |
| Jelenia Gora | 71,967 | -1.42% |
| Myslowice | 69,412 | -0.88% |
| Pila | 67,606 | -1.18% |
| Ostrow Wielkopolski | 67,119 | -1.04% |
| Suwalki | 66,761 | -0.72% |
| Pruszkow | 65,729 | 0.14% |
| Stargard | 65,503 | -0.55% |
| Inowroclaw | 64,211 | -1.59% |
| Lubin | 64,179 | -1.73% |
| Konin | 63,086 | -2.02% |
| Piotrkow Trybunalski | 62,994 | -1.8% |
| Zory | 61,701 | -0.04% |
| Siemianowice Slaskie | 61,536 | -0.99% |
| Tarnowskie Gory | 61,371 | 0.03% |
| Gniezno | 60,798 | -1.46% |
| Glogow | 58,873 | -1.74% |
| Elk | 58,825 | -0.52% |
| Ostrowiec Swietokrzyski | 58,249 | -2.11% |
| Lomza | 58,045 | -0.94% |
| Leszno | 57,532 | -1.42% |
| Pabianice | 57,228 | -1.89% |
| Rumia | 55,546 | 1.37% |
| Zamosc | 55,469 | -1.61% |
| Tczew | 55,391 | -0.91% |
| Mielec | 55,160 | -1.07% |
| Tomaszow Mazowiecki | 54,632 | -1.66% |
| Chelm | 53,886 | -1.98% |
| Biala Podlaska | 53,021 | -0.88% |
| Przemysl | 52,690 | -2.04% |
| Piaseczno | 52,010 | 0.03% |
| Legionowo | 51,763 | -0.55% |
| Stalowa Wola | 51,588 | -2.19% |
| Zgierz | 51,319 | -1.4% |
| Bedzin | 51,192 | -1.67% |
| Kedzierzyn-Kozle | 50,783 | -2.26% |
| Marki | 50,470 | 3.62% |
| Swidnica | 50,122 | -1.77% |
| Piekary Slaskie | 49,802 | -1.24% |
| Belchatow | 49,459 | -1.86% |
| Zabki | 47,869 | 1.82% |
| Raciborz | 47,334 | -1.58% |
| Ostroleka | 45,958 | -1.6% |
| Wejherowo | 44,270 | -1.34% |
| Swietochlowice | 43,889 | -1.15% |
| Zawiercie | 43,830 | -1.67% |
| Starogard Gdanski | 43,725 | -1.17% |
| Skierniewice | 43,368 | -1.36% |
| Wodzislaw Slaski | 43,210 | -1.22% |
| Otwock | 42,968 | -0.71% |
| Krosno | 42,606 | -1.11% |
| Mikolow | 42,152 | 0.43% |
| Kolobrzeg | 42,090 | -1.04% |
| Tarnobrzeg | 41,987 | -1.33% |
| Pulawy | 41,831 | -1.57% |
| Starachowice | 41,773 | -2.02% |
| Debica | 41,442 | -1.21% |
| Radomsko | 40,861 | -1.67% |
| Ciechanow | 40,333 | -1.14% |
| Minsk Mazowiecki | 38,910 | -0.78% |
| Skarzysko-Kamienna | 38,606 | -2.16% |
| Nysa | 38,581 | -1.75% |
| Kutno | 38,529 | -1.83% |
| Chojnice | 37,924 | -0.7% |
| Zyrardow | 37,453 | -0.99% |
| Swinoujscie | 37,032 | -1.63% |
| Sieradz | 36,879 | -1.62% |
| Zdunska Wola | 36,334 | -1.83% |
| Boleslawiec | 36,312 | -0.67% |
| Grodzisk Mazowiecki | 36,290 | 1.49% |
| Szczecinek | 36,262 | -1.16% |
| Kwidzyn | 35,524 | -1.22% |
| Malbork | 35,363 | -1.24% |
| Swidnik | 34,945 | -1.6% |
| Nowa Sol | 34,868 | -1.1% |
| Wolomin | 34,608 | -0.96% |
| Knurow | 34,340 | -1.21% |
| Czechowice-Dziedzice | 34,078 | -0.68% |
| Olesnica | 34,073 | -1.02% |
| Jaroslaw | 33,842 | -1.4% |
| Oswiecim | 33,604 | -1.88% |
| Lebork | 33,264 | -0.73% |
| Zary | 33,157 | -1.63% |
| Pruszcz Gdanski | 33,075 | 0.93% |
| Olawa | 33,014 | -0.15% |
| Nowy Targ | 32,755 | -0.31% |
| Sanok | 32,619 | -1.71% |
| Lubon | 32,554 | -0.28% |
| Chrzanow | 32,255 | -1.67% |
| Sochaczew | 32,034 | -1.44% |
| Brzeg | 31,834 | -1.59% |
| Cieszyn | 31,487 | -1.5% |
| Ilawa | 31,487 | -0.73% |
| Wrzesnia | 31,422 | -0.36% |
| Jaslo | 31,140 | -1.64% |
| Mlawa | 30,627 | -0.19% |
| Olkusz | 30,540 | -1.81% |
| Sopot | 30,378 | -1.62% |
| Ostroda | 30,292 | -1.12% |
| Kobylka | 30,162 | 2.1% |
| Wieliczka | 29,824 | 2.32% |
| Reda | 29,493 | 0.91% |
| Krasnik | 29,447 | -2.01% |
| Zywiec | 28,851 | -1% |
| Dzierzoniow | 28,828 | -1.98% |
| Czeladz | 28,708 | -1.32% |
| Nowy Dwor Mazowiecki | 28,394 | -0.18% |
| Augustow | 28,262 | -0.85% |
| Police | 28,193 | -1.64% |
| Myszkow | 27,891 | -1.72% |
| Bochnia | 27,700 | -0.88% |
| Zgorzelec | 27,445 | -1.74% |
| Krotoszyn | 27,281 | -1.01% |
| Brodnica | 27,207 | -1.18% |
| Bielawa | 26,772 | -1.52% |
| Swarzedz | 26,761 | -1.79% |
| Srem | 26,357 | -1.78% |
| Lukow | 26,076 | -1.35% |
| Gizycko | 25,982 | -1.65% |
| Jarocin | 25,873 | -0.53% |
| Czerwionka-Leszczyny | 25,801 | -0.91% |
| Wyszkow | 25,532 | -0.63% |
| Swiecie | 24,909 | 0.09% |
| Wagrowiec | 24,846 | -0.73% |
| Lowicz | 24,601 | -1.79% |
| Sroda Wielkopolska | 24,473 | 0.2% |
| Zakopane | 24,378 | -1.1% |
| Gorlice | 24,255 | -1.68% |
| Pszczyna | 24,251 | -1.05% |
| Bilgoraj | 23,769 | -1.37% |
| Skawina | 23,655 | -0.44% |
| Ketrzyn | 23,602 | -2.05% |
| Klodzko | 23,509 | -1.78% |
| Turek | 23,155 | -1.81% |
| Lubliniec | 22,885 | -0.66% |
| Walcz | 22,721 | -1.23% |
| Koscierzyna | 22,670 | -0.9% |
| Bielsk Podlaski | 22,658 | -1.66% |
| Orzesze | 22,529 | 0.81% |
| Koscian | 22,492 | -1.31% |
| Piastow | 22,418 | -0.75% |
| Zagan | 22,090 | -1.99% |
| Aleksandrow Lodzki | 21,785 | -0.33% |
| Sulejowek | 21,701 | 0.42% |
| Jozefow | 21,493 | 0.43% |
| Bialogard | 21,374 | -1.58% |
| Swiebodzice | 21,198 | -0.94% |
| Szczytno | 21,133 | -1.15% |
| Plonsk | 21,131 | -0.62% |
| Kluczbork | 21,065 | -1.49% |
| Ostrow Mazowiecka | 20,825 | -1.11% |
| Polkowice | 20,712 | -1.01% |
| Goleniow | 20,448 | -1.6% |
| Laziska Gorne | 20,422 | -1.11% |
| Grajewo | 20,177 | -1.17% |
| Zambrow | 20,116 | -1.18% |
| Sandomierz | 19,969 | -2.09% |
| Bartoszyce | 19,942 | -2.19% |
| Swiebodzin | 19,880 | -1.46% |
| Mragowo | 19,400 | -1.87% |
| Dzialdowo | 19,334 | -1.33% |
| Rydultowy | 19,327 | -1.41% |
| Wielun | 19,274 | -1.95% |
| Gostyn | 19,235 | -0.98% |
| Nowa Ruda | 19,219 | -2% |
| Jawor | 19,102 | -2.33% |
| Gryfino | 18,816 | -1.5% |
| Luban | 18,747 | -1.38% |
| Rawicz | 18,719 | -1.61% |
| Lubartow | 18,647 | -1.87% |
| Bierun | 18,444 | -0.7% |
| Kolo | 18,057 | -2.39% |
| Hajnowka | 17,985 | -1.77% |
| Prudnik | 17,871 | -1.97% |
| Opoczno | 17,740 | -2.11% |
| Trzebinia | 17,593 | -1.67% |
| Ozorkow | 17,122 | -1.77% |
| Andrychow | 17,050 | -2.35% |
| Pyskowice | 17,002 | -0.45% |
| Chelmno | 16,935 | -2.11% |
| Leczna | 16,845 | -1.57% |
| Tomaszow Lubelski | 16,821 | -1.96% |
| Krasnystaw | 16,658 | -1.37% |
| Chodziez | 16,291 | -2.02% |
| Konskie | 16,227 | -2.27% |
| Strzelce Opolskie | 16,200 | -1.54% |
| Naklo nad Notecia | 16,115 | -1.77% |
| Gostynin | 16,072 | -1.83% |
| Kamienna Gora | 15,860 | -2.5% |
| Pionki | 15,107 | -2.07% |
| Kozienice | 14,587 | -2.07% |
