Yamaguchi山口県
Yamaguchi 山口市
Data last updated:
Yamaguchi, Yamaguchi, Japan has a population of 190,271 (2025 national census). IPSS projections estimate 183,824 by 2030 and 158,010 by 2050 (a decrease of about 18.5% from 2020), with the share of residents aged 65+ rising from 29.3% in 2020 to 38.3%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
190,271
2030
(Projection)
183,824
▼ -5.2%
2040
(Projection)
171,592
▼ -11.5%
2050
(Projection)
158,010
▼ -18.5%
Change vs. 2020 census
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Other municipalities in Yamaguchi (山口県)
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.
Yamaguchi 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 | 173,590 | ▼ -10.5% | Census |
| 1985 | 183,149 | ▼ -5.6% | Census |
| 1990 | 187,793 | ▼ -3.2% | Census |
| 1995 | 193,172 | ▼ -0.4% | Census |
| 2000 | 197,115 | ▲ +1.6% | Census |
| 2005 | 199,297 | ▲ +2.7% | Census |
| 2010 | 196,628 | ▲ +1.4% | Census |
| 2015 | 197,422 | ▲ +1.8% | Census |
| 2020 | 193,966 | — | Census |
| 2025 | 190,271 | ▼ -1.9% | Census |
| 2030 | 183,824 | ▼ -5.2% | Projection |
| 2035 | 177,930 | ▼ -8.3% | Projection |
| 2040 | 171,592 | ▼ -11.5% | Projection |
| 2045 | 164,807 | ▼ -15.0% | Projection |
| 2050 | 158,010 | ▼ -18.5% | Projection |
About Yamaguchi
Overview
Yamaguchi (山口市) is a municipality in Yamaguchi, Japan, with a population of 190,271 as of 2025.
Population Projection of Yamaguchi
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Yamaguchi's population is expected to reach 183,824 by 2030 (-5.2%), 171,592 by 2040 (-11.5%), and 158,010 by 2050 (-18.5%). A modest population change is expected.
Aging Rate of Yamaguchi
The aging rate (percentage of residents aged 65 and over) is 29.3% as of 2020 and is projected to rise to 38.3% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Yamaguchi's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1387 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1389 out of 1903 nationwide.
- Population size: Ranked #191 out of 1917 nationwide.
- Related: National rankings / All municipalities in Yamaguchi
Earnings in Yamaguchi (山口県): Average salary in Yamaguchi (山口県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure