Fukui福井県
Ooi おおい町
Data last updated:
Ooi, Fukui, Japan has a population of 7,261 (2025 national census). IPSS projections estimate 6,979 by 2030 and 5,252 by 2050 (a decrease of about 33.6% from 2020), with the share of residents aged 65+ rising from 32.2% in 2020 to 39.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
7,261
2030Projection
6,979
▼ -11.8%
2040Projection
6,114
▼ -22.7%
2050Projection
5,252
▼ -33.6%
Change vs. 2020 census
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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.
Ooi 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 | 9,156 | ▲ +15.8% | Census |
| 1985 | 9,791 | ▲ +23.8% | Census |
| 1990 | 10,598 | ▲ +34.0% | Census |
| 1995 | 10,251 | ▲ +29.6% | Census |
| 2000 | 9,983 | ▲ +26.2% | Census |
| 2005 | 9,217 | ▲ +16.5% | Census |
| 2010 | 8,580 | ▲ +8.5% | Census |
| 2015 | 8,325 | ▲ +5.2% | Census |
| 2020 | 7,910 | — | Census |
| 2025 | 7,261 | ▼ -8.2% | Census |
| 2030 | 6,979 | ▼ -11.8% | Projection |
| 2035 | 6,539 | ▼ -17.3% | Projection |
| 2040 | 6,114 | ▼ -22.7% | Projection |
| 2045 | 5,681 | ▼ -28.2% | Projection |
| 2050 | 5,252 | ▼ -33.6% | Projection |
About Ooi
Overview
Ooi (おおい町) is a municipality in Fukui, Japan, with a population of 7,261 as of 2025.
Population Projection of Ooi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ooi's population is expected to reach 6,979 by 2030 (-11.8%), 6,114 by 2040 (-22.7%), and 5,252 by 2050 (-33.6%). A significant population decline is projected over the next three decades.
Aging Rate of Ooi
The aging rate (percentage of residents aged 65 and over) is 32.2% as of 2020 and is projected to rise to 39.8% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Ooi's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #936 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1279 out of 1903 nationwide.
- Population size: Ranked #1458 out of 1917 nationwide.
- Related: National rankings / All municipalities in Fukui
Earnings in Fukui (福井県): Average salary in Fukui (福井県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure