Okayama岡山県
Setouchi 瀬戸内市
Data last updated:
Setouchi, Okayama, Japan has a population of 36,054 (2020 national census). IPSS projections estimate 33,200 by 2030 and 26,719 by 2050 (a decrease of about 25.9% from 2020), with the share of residents aged 65+ rising from 34.6% to 43.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2020
(Census)
36,054
2030
(Projection)
33,200
▼ -7.9%
2040
(Projection)
29,991
▼ -16.8%
2050
(Projection)
26,719
▼ -25.9%
Other municipalities in Okayama (岡山県)
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.
Setouchi Population Projection Table (2020–2050)
Population by year, based on the national census and IPSS (2023) projections.
| Year | Population | vs 2020 | Type |
|---|---|---|---|
| 2020 | 36,054 | — | Census |
| 2025 | 34,644 | ▼ -3.9% | Projection |
| 2030 | 33,200 | ▼ -7.9% | Projection |
| 2035 | 31,660 | ▼ -12.2% | Projection |
| 2040 | 29,991 | ▼ -16.8% | Projection |
| 2045 | 28,338 | ▼ -21.4% | Projection |
| 2050 | 26,719 | ▼ -25.9% | Projection |
About Setouchi
Overview
Setouchi (瀬戸内市) is a municipality in Okayama, Japan, with a population of 36,054 as of 2020.
Population Projection of Setouchi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Setouchi's population is expected to reach 33,200 by 2030 (-7.9%), 29,991 by 2040 (-16.8%), and 26,719 by 2050 (-25.9%). A significant population decline is projected over the next three decades.
Aging Rate of Setouchi
The aging rate (percentage of residents aged 65 and over) is 34.6% as of 2020 and is projected to rise to 43.2% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Setouchi's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1183 out of 1916 municipalities nationwide.
- Aging rate in 2050: Ranked #1009 out of 1916 nationwide.
- Population size: Ranked #841 out of 1916 nationwide.
- Related: National rankings / All municipalities in Okayama