Saga佐賀県
Shiroishi 白石町
Data last updated:
Shiroishi, Saga, Japan has a population of 20,255 (2025 national census). IPSS projections estimate 18,671 by 2030 and 12,558 by 2050 (a decrease of about 43.1% from 2020), with the share of residents aged 65+ rising from 36.2% in 2020 to 49.4%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025Census
20,255
2030Projection
18,671
▼ -15.3%
2040Projection
15,557
▼ -29.4%
2050Projection
12,558
▼ -43.1%
Change vs. 2020 census
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Other municipalities in Saga (佐賀県)
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.
Shiroishi 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 | 31,790 | ▲ +44.2% | Census |
| 1985 | 31,464 | ▲ +42.7% | Census |
| 1990 | 30,539 | ▲ +38.5% | Census |
| 1995 | 29,510 | ▲ +33.8% | Census |
| 2000 | 28,393 | ▲ +28.8% | Census |
| 2005 | 27,057 | ▲ +22.7% | Census |
| 2010 | 25,607 | ▲ +16.1% | Census |
| 2015 | 23,941 | ▲ +8.6% | Census |
| 2020 | 22,051 | — | Census |
| 2025 | 20,255 | ▼ -8.1% | Census |
| 2030 | 18,671 | ▼ -15.3% | Projection |
| 2035 | 17,077 | ▼ -22.6% | Projection |
| 2040 | 15,557 | ▼ -29.4% | Projection |
| 2045 | 14,043 | ▼ -36.3% | Projection |
| 2050 | 12,558 | ▼ -43.1% | Projection |
About Shiroishi
Overview
Shiroishi (白石町) is a municipality in Saga, Japan, with a population of 20,255 as of 2025.
Population Projection of Shiroishi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Shiroishi's population is expected to reach 18,671 by 2030 (-15.3%), 15,557 by 2040 (-29.4%), and 12,558 by 2050 (-43.1%). A significant population decline is projected over the next three decades.
Aging Rate of Shiroishi
The aging rate (percentage of residents aged 65 and over) is 36.2% as of 2020 and is projected to rise to 49.4% by 2050. Over 40% of residents will be elderly, significantly affecting healthcare and social services needs.
National Comparison
Shiroishi is experiencing one of the faster rates of population decline in Japan.
National and Prefectural Rank
- Population decline rate: Ranked #601 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #602 out of 1903 nationwide.
- Population size: Ranked #1070 out of 1917 nationwide.
- Related: National rankings / All municipalities in Saga
Earnings in Saga (佐賀県): Average salary in Saga (佐賀県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure