Akita秋田県
Oga 男鹿市
Data last updated:
Oga, Akita, Japan has a population of 21,566 (2025 national census). IPSS projections estimate 18,976 by 2030 and 9,456 by 2050 (a decrease of about 62.4% from 2020), with the share of residents aged 65+ rising from 47.2% in 2020 to 66.8%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
21,566
2030
(Projection)
18,976
▼ -24.6%
2040
(Projection)
13,776
▼ -45.2%
2050
(Projection)
9,456
▼ -62.4%
Change vs. 2020 census
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Other municipalities in Akita (秋田県)
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.
Oga 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 | 47,829 | ▲ +90.1% | Census |
| 1985 | 45,891 | ▲ +82.4% | Census |
| 1990 | 42,723 | ▲ +69.8% | Census |
| 1995 | 40,517 | ▲ +61.1% | Census |
| 2000 | 38,130 | ▲ +51.6% | Census |
| 2005 | 35,637 | ▲ +41.7% | Census |
| 2010 | 32,294 | ▲ +28.4% | Census |
| 2015 | 28,375 | ▲ +12.8% | Census |
| 2020 | 25,154 | — | Census |
| 2025 | 21,566 | ▼ -14.3% | Census |
| 2030 | 18,976 | ▼ -24.6% | Projection |
| 2035 | 16,281 | ▼ -35.3% | Projection |
| 2040 | 13,776 | ▼ -45.2% | Projection |
| 2045 | 11,478 | ▼ -54.4% | Projection |
| 2050 | 9,456 | ▼ -62.4% | Projection |
About Oga
Overview
Oga (男鹿市) is a municipality in Akita, Japan, with a population of 21,566 as of 2025.
Population Projection of Oga
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Oga's population is expected to reach 18,976 by 2030 (-24.6%), 13,776 by 2040 (-45.2%), and 9,456 by 2050 (-62.4%). The town is projected to lose more than half its population over 30 years.
Aging Rate of Oga
The aging rate (percentage of residents aged 65 and over) is 47.2% as of 2020 and is projected to rise to 66.8% by 2050. More than half of residents will be seniors, placing the town in the "marginal municipality" category.
National Comparison
Oga is among the most rapidly declining municipalities in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #40 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #21 out of 1903 nationwide.
- Population size: Ranked #1045 out of 1917 nationwide.
- Related: National rankings / All municipalities in Akita
Earnings in Akita (秋田県): Average salary in Akita (秋田県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure