Regional Statistics
2,084
1,073
people/km²
4,818
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Population in Sejny city Municipality 2025
In 2024, Sejny city municipality ranked 1805 of 2,478 Polish municipalities. Population shrank by 442 residents -8.4% between 2019-2024, at 4,818.
Among 1984 declining municipalities, in bottom 20% for rate of decline. Within Sejneński county, ranked 1 of 5 municipalities.
Based on 31 years of official GUS statistics for Sejneński county municipalities within Podlaskie province.
Total Population
-1.45
%
since
2023
2024
4,818
Population Density
-1.45
%
since
2023
2024
1,073.1
per km²
Vital Statistics
births and deaths
Live Births
+31.82
%
since
2023
2024
29
Deaths
+68.29
%
since
2023
2024
69
Age Structure
children, working age, and elderly
Children (0-14)
-3.58
%
since
2023
2024
565
Working Age (15-64)
-2.32
%
since
2023
2024
3,077
Elderly (65+)
+1.99
%
since
2023
2024
1,176
Gender
Men
-1.29
%
since
2023
2024
2,289
Women
-1.60
%
since
2023
2024
2,529
Age Distribution
from 0 to 75+ years
0-4 years
-0.64
%
since
2023
2024
156
5-9 years
0.00
%
since
2023
2024
196
10-14 years
-8.58
%
since
2023
2024
213
15-19 years
+4.04
%
since
2023
2024
283
20-24 years
-7.17
%
since
2023
2024
207
25-29 years
-6.90
%
since
2023
2024
216
30-34 years
-2.08
%
since
2023
2024
235
35-39 years
-15.98
%
since
2023
2024
326
40-44 years
+9.64
%
since
2023
2024
398
45-49 years
-3.13
%
since
2023
2024
372
50-54 years
+6.31
%
since
2023
2024
354
55-59 years
-1.24
%
since
2023
2024
319
60-64 years
-6.38
%
since
2023
2024
367
65-69 years
+2.86
%
since
2023
2024
395
70-74 years
-0.97
%
since
2023
2024
307
75-79 years
+15.94
%
since
2023
2024
80
80-84 years
-5.76
%
since
2023
2024
131
85+ years
-1.42
%
since
2023
2024
139