Regional Statistics
2,084
1,073
people/km²
4,818
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Population in Sejny city Municipality 2026
Sejny city municipality ranks 1805 of 2,478 Polish municipalities. Population shrank by 442 residents -8.4% between 2019-2024, now at 4,818.
Among 1984 declining municipalities, in bottom 20% for rate of decline. Within Sejneński county, ranks 1 of 5 municipalities.
Based on 31 years of official GUS statistics for Sejneński county municipalities within Podlaskie voivodeship.
Total Population Chart
Lowest at 4,818 in 2024
Highest at 6,119 in 1998
1995
29 years (+5 year forecast)
2024
Gmina Ranking
1805/2478 Municipality 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
Sejny city