Saitama埼玉県
Oomiya さいたま市大宮区
Data last updated:
Oomiya, Saitama, Japan has a population of 125,285 (2025 national census). IPSS projections estimate 123,793 by 2030 and 124,821 by 2050 (an increase of about 6.0% from 2020), with the share of residents aged 65+ rising from 22.5% in 2020 to 27.0%.Sources: Japan Census (Statistics Bureau), IPSS Regional Population Projections (2023)
2025
(Census)
125,285
2030
(Projection)
123,793
▲ +5.1%
2040
(Projection)
125,870
▲ +6.9%
2050
(Projection)
124,821
▲ +6.0%
Change vs. 2020 census
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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.
Oomiya Population Table (2005–2050)
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 |
|---|---|---|---|
| 2005 | 106,477 | ▼ -9.6% | Census |
| 2010 | 108,488 | ▼ -7.9% | Census |
| 2015 | 113,864 | ▼ -3.3% | Census |
| 2020 | 117,784 | — | Census |
| 2025 | 125,285 | ▲ +6.4% | Census |
| 2030 | 123,793 | ▲ +5.1% | Projection |
| 2035 | 125,229 | ▲ +6.3% | Projection |
| 2040 | 125,870 | ▲ +6.9% | Projection |
| 2045 | 125,705 | ▲ +6.7% | Projection |
| 2050 | 124,821 | ▲ +6.0% | Projection |
About Oomiya
Overview
Oomiya (さいたま市大宮区) is a municipality in Saitama, Japan, with a population of 125,285 as of 2025.
Population Projection of Oomiya
According to projections by Japan's National Institute of Population and Social Security Research (IPSS), Oomiya's population is expected to reach 123,793 by 2030 (+5.1%), 125,870 by 2040 (+6.9%), and 124,821 by 2050 (+6.0%). Oomiya is among the rare Japanese municipalities projected to see population growth.
Aging Rate of Oomiya
The aging rate (percentage of residents aged 65 and over) is 22.5% as of 2020 and is projected to rise to 27.0% by 2050. The aging rate will remain below the most severe Japanese averages.
National Comparison
Oomiya's demographic trajectory is similar to the national average.
National and Prefectural Rank
- Population decline rate: Ranked #1864 out of 1903 municipalities nationwide.
- Aging rate in 2050: Ranked #1873 out of 1903 nationwide.
- Population size: Ranked #332 out of 1917 nationwide.
- Related: National rankings / All municipalities in Saitama
Earnings in Saitama (埼玉県): Average salary in Saitama (埼玉県) by age, gender and company sizejpsalary / MHLW Basic Survey on Wage Structure