Ehime愛媛県
Niihama 新居浜市
Data last updated:
Niihama, Ehime, Japan has a population of 108,648 (2025 national census). IPSS projections estimate 104,245 by 2030 and 84,485 by 2050 (a decrease of about 27.1% from 2020), with the share of residents aged 65+ rising from 32.6% in 2020 to 40.5%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
108,648
2030
(Projection)
104,245
▼ -10.1%
2040
(Projection)
94,334
▼ -18.6%
2050
(Projection)
84,485
▼ -27.1%
Change vs. 2020 census
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Other municipalities in Ehime (愛媛県)
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.
Niihama 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 | 132,736 | ▲ +14.5% | Census |
| 1985 | 132,540 | ▲ +14.3% | Census |
| 1990 | 129,467 | ▲ +11.7% | Census |
| 1995 | 128,236 | ▲ +10.6% | Census |
| 2000 | 125,814 | ▲ +8.5% | Census |
| 2005 | 123,952 | ▲ +6.9% | Census |
| 2010 | 121,735 | ▲ +5.0% | Census |
| 2015 | 119,903 | ▲ +3.4% | Census |
| 2020 | 115,938 | — | Census |
| 2025 | 108,648 | ▼ -6.3% | Census |
| 2030 | 104,245 | ▼ -10.1% | Projection |
| 2035 | 99,242 | ▼ -14.4% | Projection |
| 2040 | 94,334 | ▼ -18.6% | Projection |
| 2045 | 89,401 | ▼ -22.9% | Projection |
| 2050 | 84,485 | ▼ -27.1% | Projection |
About Niihama
Overview
Niihama (新居浜市) is a municipality in Ehime, Japan, with a population of 108,648 as of 2025.
Population Projection of Niihama
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Niihama's population is expected to reach 104,245 by 2030 (-10.1%), 94,334 by 2040 (-18.6%), and 84,485 by 2050 (-27.1%). A significant population decline is projected over the next three decades.
Aging Rate of Niihama
The aging rate (percentage of residents aged 65 and over) is 32.6% as of 2020 and is projected to rise to 40.5% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Niihama's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1144 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1215 out of 1903 nationwide.
- Population size: Ranked #390 out of 1917 nationwide.
- Related: National rankings / All municipalities in Ehime
Earnings in Ehime (愛媛県): Average salary in Ehime (愛媛県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure