Oita大分県
Ooita 大分市
Data last updated:
Ooita, Oita, Japan has a population of 470,076 (2025 national census). IPSS projections estimate 463,901 by 2030 and 415,875 by 2050 (a decrease of about 12.6% from 2020), with the share of residents aged 65+ rising from 27.6% in 2020 to 36.7%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
470,076
2030
(Projection)
463,901
▼ -2.5%
2040
(Projection)
442,887
▼ -6.9%
2050
(Projection)
415,875
▼ -12.6%
Change vs. 2020 census
Enter your age
See the population of 大分市 when you turn 50, 60, 70 and 80.
Other municipalities in Oita (大分県)
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.
Ooita 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 | 385,635 | ▼ -18.9% | Census |
| 1985 | 413,622 | ▼ -13.0% | Census |
| 1990 | 429,927 | ▼ -9.6% | Census |
| 1995 | 446,581 | ▼ -6.1% | Census |
| 2000 | 454,424 | ▼ -4.5% | Census |
| 2005 | 462,317 | ▼ -2.8% | Census |
| 2010 | 474,094 | ▼ -0.3% | Census |
| 2015 | 478,146 | ▲ +0.5% | Census |
| 2020 | 475,614 | — | Census |
| 2025 | 470,076 | ▼ -1.2% | Census |
| 2030 | 463,901 | ▼ -2.5% | Projection |
| 2035 | 454,389 | ▼ -4.5% | Projection |
| 2040 | 442,887 | ▼ -6.9% | Projection |
| 2045 | 429,753 | ▼ -9.6% | Projection |
| 2050 | 415,875 | ▼ -12.6% | Projection |
About Ooita
Overview
Ooita (大分市) is a municipality in Oita, Japan, with a population of 470,076 as of 2025.
Population Projection of Ooita
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Ooita's population is expected to reach 463,901 by 2030 (-2.5%), 442,887 by 2040 (-6.9%), and 415,875 by 2050 (-12.6%). A modest population change is expected.
Aging Rate of Ooita
The aging rate (percentage of residents aged 65 and over) is 27.6% as of 2020 and is projected to rise to 36.7% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Ooita's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1552 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1506 out of 1903 nationwide.
- Population size: Ranked #41 out of 1917 nationwide.
- Related: National rankings / All municipalities in Oita
Earnings in Oita (大分県): Average salary in Oita (大分県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure