Konstancin-Jeziorna Population 2026
Konstancin-Jeziorna has a population of 16,548, making it the #311 biggest city in 🇵🇱 Poland, located in Mazovia. It is about 103× smaller than Warsaw, the country's biggest city.
Population (city proper)
16,548
Rank in Poland
#311
Coordinates
52.09°N, 21.12°E
~89 m elevation · Europe/Warsaw
Distance to capital (Warsaw)
17 km
11 miles, straight line
Other big cities in Mazovia
Cities near Konstancin-Jeziorna
FAQ
What is the population of Konstancin-Jeziorna?
Konstancin-Jeziorna has a population of 16,548 (city proper, latest official figure via GeoNames), making it the #311 biggest city in Poland.
What region is Konstancin-Jeziorna in?
Konstancin-Jeziorna is located in Mazovia, Poland.
Is Konstancin-Jeziorna the capital of Poland?
No, the capital of Poland is Warsaw, about 17 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.