Map of Ostrołęka, Poland

Ostrołęka is a city in Mazovia, Poland, with a population of about 53,740. It lies at 53.0862°N, 21.5757°E. Ostrołęka is about 103 km (64 mi) north of Warsaw, the capital. The nearest city on our map is Łomża, 34 km to the east.

Ostrołęka at a glance

Where is Ostrołęka?

• The 15th largest city in Mazovia on this site.
• Located in the Northern and Eastern hemispheres.
• Daylight ranges from about 7 h 33 min on the shortest day to 16 h 57 min on the longest day (around 21 December and 21 June).

Cities near Ostrołęka

• Łomża — 34 km east
• Ciechanów — 68 km west
• Wołomin — 86 km south
• Legionowo — 88 km southwest
• Targówek — 95 km south
• Ełk — 98 km northeast
• Bielany — 98 km southwest
• Żoliborz — 99 km southwest
• Praga Południe — 99 km south
• Mińsk Mazowiecki — 101 km south

Largest cities in Mazovia

• Warsaw — 1,702,139
• Radom — 226,794
• Mokotów — 217,683
• Praga Południe — 179,836
• Ursynów — 149,775
• Wola — 140,958
• Bielany — 131,910
• Płock — 127,474
• Targówek — 124,279
• Śródmieście — 99,950

Largest cities in Poland

• Warsaw — 1,702,139
• Kraków — 816,614
• Wrocław — 672,545
• Łódź — 639,890
• Poznań — 536,151
• Gdańsk — 487,371
• Szczecin — 395,513
• Lublin — 336,339
• Bydgoszcz — 330,038
• Białystok — 295,683

Map of Poland and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.