Niigata新潟県
Itoigawa 糸魚川市
Data last updated:
Itoigawa, Niigata, Japan has a population of 36,519 (2025 national census). IPSS projections estimate 33,577 by 2030 and 22,382 by 2050 (a decrease of about 45.1% from 2020), with the share of residents aged 65+ rising from 40.1% in 2020 to 49.5%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
36,519
2030
(Projection)
33,577
▼ -17.6%
2040
(Projection)
27,605
▼ -32.3%
2050
(Projection)
22,382
▼ -45.1%
Change vs. 2020 census
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Other municipalities in Niigata (新潟県)
Data Sources
- Portal Site of Official Statistics of Japan (e-Stat)（https://www.e-stat.go.jp/）
- National Institute of Population and Social Security Research (IPSS), Regional Population Projections (2023 ed.)
* This service uses the e-Stat API but its content is not guaranteed by the Japanese government.
Itoigawa 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 | 61,488 | ▲ +50.8% | Census |
| 1985 | 60,612 | ▲ +48.7% | Census |
| 1990 | 56,803 | ▲ +39.3% | Census |
| 1995 | 54,780 | ▲ +34.4% | Census |
| 2000 | 53,021 | ▲ +30.1% | Census |
| 2005 | 49,844 | ▲ +22.3% | Census |
| 2010 | 47,702 | ▲ +17.0% | Census |
| 2015 | 44,162 | ▲ +8.3% | Census |
| 2020 | 40,765 | — | Census |
| 2025 | 36,519 | ▼ -10.4% | Census |
| 2030 | 33,577 | ▼ -17.6% | Projection |
| 2035 | 30,494 | ▼ -25.2% | Projection |
| 2040 | 27,605 | ▼ -32.3% | Projection |
| 2045 | 24,906 | ▼ -38.9% | Projection |
| 2050 | 22,382 | ▼ -45.1% | Projection |
About Itoigawa
Overview
Itoigawa (糸魚川市) is a municipality in Niigata, Japan, with a population of 36,519 as of 2025.
Population Projection of Itoigawa
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Itoigawa's population is expected to reach 33,577 by 2030 (-17.6%), 27,605 by 2040 (-32.3%), and 22,382 by 2050 (-45.1%). A significant population decline is projected over the next three decades.
Aging Rate of Itoigawa
The aging rate (percentage of residents aged 65 and over) is 40.1% as of 2020 and is projected to rise to 49.5% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Itoigawa is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #526 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #591 out of 1903 nationwide.
- Population size: Ranked #819 out of 1917 nationwide.
- Related: National rankings / All municipalities in Niigata
Earnings in Niigata (新潟県): Average salary in Niigata (新潟県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure