Nagano長野県
Oomachi 大町市
Data last updated:
Oomachi, Nagano, Japan has a population of 23,956 (2025 national census). IPSS projections estimate 21,851 by 2030 and 14,411 by 2050 (a decrease of about 44.6% from 2020), with the share of residents aged 65+ rising from 38.9% in 2020 to 51.7%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025年
(实际)
23,956人
2030年
(预测)
21,851人
▼ -16.1%
2040年
(预测)
17,984人
▼ -30.9%
2050年
(预测)
14,411人
▼ -44.6%
Change vs. 2020 census
请输入您的年龄
输入年龄，即可查看您50、60、70、80岁时大町市的人口。
Nagano (長野県)的其他市区町村
数据来源
- 日本政府统计综合窗口(e-Stat)（https://www.e-stat.go.jp/）
- 国立社会保障・人口问题研究所「日本地区别未来推计人口（令和5年推计）」
※本服务使用e-Stat的API功能，但服务内容不受日本政府保证。
Oomachi 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 | 36,083 | ▲ +38.6% | Census |
| 1985 | 35,460 | ▲ +36.2% | Census |
| 1990 | 34,300 | ▲ +31.8% | Census |
| 1995 | 33,655 | ▲ +29.3% | Census |
| 2000 | 33,550 | ▲ +28.9% | Census |
| 2005 | 32,145 | ▲ +23.5% | Census |
| 2010 | 29,801 | ▲ +14.5% | Census |
| 2015 | 28,041 | ▲ +7.7% | Census |
| 2020 | 26,029 | — | Census |
| 2025 | 23,956 | ▼ -8.0% | Census |
| 2030 | 21,851 | ▼ -16.1% | Projection |
| 2035 | 19,890 | ▼ -23.6% | Projection |
| 2040 | 17,984 | ▼ -30.9% | Projection |
| 2045 | 16,147 | ▼ -38.0% | Projection |
| 2050 | 14,411 | ▼ -44.6% | Projection |
About Oomachi
Overview
Oomachi (大町市) is a municipality in Nagano, Japan, with a population of 23,956 as of 2025.
Population Projection of Oomachi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Oomachi's population is expected to reach 21,851 by 2030 (-16.1%), 17,984 by 2040 (-30.9%), and 14,411 by 2050 (-44.6%). A significant population decline is projected over the next three decades.
Aging Rate of Oomachi
The aging rate (percentage of residents aged 65 and over) is 38.9% as of 2020 and is projected to rise to 51.7% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Oomachi is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #542 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #444 out of 1903 nationwide.
- Population size: Ranked #1008 out of 1917 nationwide.
- Related: National rankings / All municipalities in Nagano
Nagano (長野県)的收入水平: Nagano (長野県)的平均年收入（按年龄、性别、企业规模）jpsalary / 厚生劳动省 工资结构基本统计调查