Osaka大阪府
Sennan 泉南市
Data last updated:
Sennan, Osaka, Japan has a population of 56,107 (2025 national census). IPSS projections estimate 53,205 by 2030 and 40,136 by 2050 (a decrease of about 33.2% from 2020), with the share of residents aged 65+ rising from 30.0% in 2020 to 44.2%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
56,107
2030
(Projection)
53,205
▼ -11.5%
2040
(Projection)
46,602
▼ -22.5%
2050
(Projection)
40,136
▼ -33.2%
Change vs. 2020 census
Enter your age
See the population of 泉南市 when you turn 50, 60, 70 and 80.
Other municipalities in Osaka (大阪府)
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.
Sennan 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 | 53,324 | ▼ -11.3% | Census |
| 1985 | 60,059 | ▼ -0.1% | Census |
| 1990 | 60,065 | ▼ -0.1% | Census |
| 1995 | 61,688 | ▲ +2.6% | Census |
| 2000 | 64,152 | ▲ +6.7% | Census |
| 2005 | 64,683 | ▲ +7.6% | Census |
| 2010 | 64,403 | ▲ +7.2% | Census |
| 2015 | 62,438 | ▲ +3.9% | Census |
| 2020 | 60,102 | — | Census |
| 2025 | 56,107 | ▼ -6.6% | Census |
| 2030 | 53,205 | ▼ -11.5% | Projection |
| 2035 | 49,933 | ▼ -16.9% | Projection |
| 2040 | 46,602 | ▼ -22.5% | Projection |
| 2045 | 43,345 | ▼ -27.9% | Projection |
| 2050 | 40,136 | ▼ -33.2% | Projection |
About Sennan
Overview
Sennan (泉南市) is a municipality in Osaka, Japan, with a population of 56,107 as of 2025.
Population Projection of Sennan
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Sennan's population is expected to reach 53,205 by 2030 (-11.5%), 46,602 by 2040 (-22.5%), and 40,136 by 2050 (-33.2%). A significant population decline is projected over the next three decades.
Aging Rate of Sennan
The aging rate (percentage of residents aged 65 and over) is 30.0% as of 2020 and is projected to rise to 44.2% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Sennan's population decline rate exceeds the national average.
National and Prefectural Rank
- Population decline rate: Ranked #954 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #932 out of 1903 nationwide.
- Population size: Ranked #633 out of 1917 nationwide.
- Related: National rankings / All municipalities in Osaka
Earnings in Osaka (大阪府): Average salary in Osaka (大阪府) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure