Gunma群馬県
Oota 太田市
Data last updated:
Oota, Gunma, Japan has a population of 219,322 (2025 national census). IPSS projections estimate 219,038 by 2030 and 200,120 by 2050 (a decrease of about 10.3% from 2020), with the share of residents aged 65+ rising from 26.3% in 2020 to 34.7%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
219,322
2030
(Projection)
219,038
▼ -1.8%
2040
(Projection)
210,680
▼ -5.5%
2050
(Projection)
200,120
▼ -10.3%
Change vs. 2020 census
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Other municipalities in Gunma (群馬県)
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.
Oota 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 | 175,381 | ▼ -21.4% | Census |
| 1985 | 189,931 | ▼ -14.8% | Census |
| 1990 | 197,139 | ▼ -11.6% | Census |
| 1995 | 203,599 | ▼ -8.7% | Census |
| 2000 | 210,022 | ▼ -5.8% | Census |
| 2005 | 213,299 | ▼ -4.4% | Census |
| 2010 | 216,465 | ▼ -2.9% | Census |
| 2015 | 219,807 | ▼ -1.4% | Census |
| 2020 | 223,014 | — | Census |
| 2025 | 219,322 | ▼ -1.7% | Census |
| 2030 | 219,038 | ▼ -1.8% | Projection |
| 2035 | 215,251 | ▼ -3.5% | Projection |
| 2040 | 210,680 | ▼ -5.5% | Projection |
| 2045 | 205,600 | ▼ -7.8% | Projection |
| 2050 | 200,120 | ▼ -10.3% | Projection |
About Oota
Overview
Oota (太田市) is a municipality in Gunma, Japan, with a population of 219,322 as of 2025.
Population Projection of Oota
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Oota's population is expected to reach 219,038 by 2030 (-1.8%), 210,680 by 2040 (-5.5%), and 200,120 by 2050 (-10.3%). A modest population change is expected.
Aging Rate of Oota
The aging rate (percentage of residents aged 65 and over) is 26.3% as of 2020 and is projected to rise to 34.7% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Oota's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1609 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1628 out of 1903 nationwide.
- Population size: Ranked #157 out of 1917 nationwide.
- Related: National rankings / All municipalities in Gunma
Earnings in Gunma (群馬県): Average salary in Gunma (群馬県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure