Regional Statistics
27,801
50
people/km²
80,446
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Population in Siedlecki County 2026
Siedlecki county ranks 164 of 380 Polish counties. Population shrank by 916 residents -1.13% between 2019-2024, now at 80,446.
Among 339 declining counties, ranks in top 20% for steepest loss. Within Masovian voivodeship, ranks 20 of 42 counties (9 growing, 33 declining).
Based on 31 years of official GUS statistics for Siedlecki county and its 13 municipalities within Masovian voivodeship.
Total Population Chart
Lowest at 80,441 in 2023
Highest at 82,020 in 1997
1995
29 years (+5 year forecast)
2024
Powiat Ranking
164/380 County in Poland
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Year over Year
since 2023
2024
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Vital Statistics
births and deaths
Age Structure
children, working age, and elderly
Gender
Age Distribution
from 0 to 75+ years
Siedlecki
13 municipalities