Niigata新潟県
Aga 阿賀町
Data last updated:
Aga, Niigata, Japan has a population of 8,338 (2025 national census). IPSS projections estimate 7,398 by 2030 and 3,802 by 2050 (a decrease of about 61.8% from 2020), with the share of residents aged 65+ rising from 49.6% in 2020 to 63.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025년
(실적)
8,338명
2030년
(추계)
7,398명
▼ -25.8%
2040년
(추계)
5,382명
▼ -46.0%
2050년
(추계)
3,802명
▼ -61.8%
Change vs. 2020 census
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Niigata (新潟県)의 다른 시구정촌
데이터 출처
- 일본 정부 통계 종합 포털(e-Stat)（https://www.e-stat.go.jp/）
- 국립사회보장・인구문제연구소 「일본의 지역별 장래추계인구(레이와 5년 추계)」
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Aga Population Table (1980–2050)
Population by year: national census results (restated to current municipal boundaries) and IPSS (2023) projections based on the 2020 census.
| Year | Population | vs 2020 | Type |
|---|---|---|---|
| 1980 | 20,280 | ▲ +103.5% | Census |
| 1985 | 18,526 | ▲ +85.9% | Census |
| 1990 | 17,557 | ▲ +76.2% | Census |
| 1995 | 16,786 | ▲ +68.4% | Census |
| 2000 | 15,813 | ▲ +58.7% | Census |
| 2005 | 14,703 | ▲ +47.5% | Census |
| 2010 | 13,303 | ▲ +33.5% | Census |
| 2015 | 11,680 | ▲ +17.2% | Census |
| 2020 | 9,965 | — | Census |
| 2025 | 8,338 | ▼ -16.3% | Census |
| 2030 | 7,398 | ▼ -25.8% | Projection |
| 2035 | 6,326 | ▼ -36.5% | Projection |
| 2040 | 5,382 | ▼ -46.0% | Projection |
| 2045 | 4,546 | ▼ -54.4% | Projection |
| 2050 | 3,802 | ▼ -61.8% | Projection |
About Aga
Overview
Aga (阿賀町) is a municipality in Niigata, Japan, with a population of 8,338 as of 2025.
Population Projection of Aga
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Aga's population is expected to reach 7,398 by 2030 (-25.8%), 5,382 by 2040 (-46.0%), and 3,802 by 2050 (-61.8%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Aga
The aging rate (percentage of residents aged 65 and over) is 49.6% as of 2020 and is projected to rise to 63.8% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Aga is among the most rapidly declining municipalities in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #50 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #44 out of 1903 nationwide.
- Population size: Ranked #1413 out of 1917 nationwide.
- Related: National rankings / All municipalities in Niigata
Niigata (新潟県)의 소득 수준: Niigata (新潟県)의 평균 연봉(연령·성별·기업 규모별)jpsalary / 후생노동성 임금구조 기본통계조사