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Poland.gg
Delightfully crafted Statistical Portal for Poland
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Sejny city Municipal Statistics for 2026
2025
Latest Data

Regional Statistics

2,084
1,073 people/km²
4,818
Sejny city
4 km²
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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 province.

Total Population
-1.45 % since 2023 2024
4,818
Poland 37,489,087
Province ranked 14/16 1,132,641
County ranked 17/17 18,434
Municipality ranked 1/5 4,818
Total Population Chart
Lowest at 4,818 in 2024 Highest at 6,119 in 1998
1995
29 years (+5 year forecast)
2024
Ranking
1805/2478 Municipality in Poland
1801
Solec-Zdrój 4,840
1801
Dobre 4,840
1803
Skąpe 4,835
1804
Lisewo 4,825
1805
Sejny city 4,818
1806
Brzuze 4,812
1807
Jedwabne 4,808
1807
Zabór 4,808
1809
Gródek 4,805
1809
Zagrodno 4,805
Page 181 of 248
Change
2251/2478 Municipality in Poland
2251
Sejny city -1.5%
2252
Kraśnik city -1.5%
2253
Starachowice -1.5%
2254
Bisztynek -1.5%
2255
Kudowa-Zdrój -1.5%
2256
Gołymin-Ośrodek -1.5%
2257
Przerośl -1.5%
2258
Rajgród -1.5%
2259
Laszki -1.5%
2260
Sanok city -1.5%
Page 226 of 248
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

Data Source: Statistics Poland, Local Data Bank (BDL)