Oyama: population and official figures
In depth
- Economy, jobs and prices in Oyama: Taxable income for municipal resident tax in Oyama averaged 3.67 million yen per taxpayer in fiscal 2024, 126th highest of 262 cities and below the national average of 3,933.7 thousand yen per taxpayer. It is income before deductions, so it is not take-home pay.
- Health in Oyama: Oyama had 8 general hospitals (hospitals other than psychiatric ones) in 2023, or 4.80 per 100,000 residents, 128th lowest of 262 cities, below the national figure (5.60).
- Education in Oyama: Oyama had 24 primary schools with 8,112 pupils and 592 full-time teachers in May 2024.
- Poverty and living standards in Oyama: 34.3% of private households in Oyama were one-person households at the 2020 census (23,845), 113th lowest of 262 cities, below the national figure (38.0%).
- Government budget and revenue in Oyama: The municipal government of Oyama took in 72.6 billion yen in fiscal 2022 (final accounts), 435,698 yen per resident, 98th lowest of 262 cities.
What is the population of Oyama?
Oyama had 166,666 residents at the 1 October 2020 census (city proper). That is 121st lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Oyama and how densely populated is it?
Oyama covers 171.75 square kilometres (2024), of which 166.34 is habitable land. That is 970 people per square kilometre of total area at the 2020 census, 96th lowest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Oyama growing or shrinking?
The basic resident register recorded 166,874 residents in Oyama in 2024, 0.1% more than the 2020 census count (all municipalities together: -1.4%). The register and the census are counted differently, so the change is indicative.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many children live in Oyama?
12.6% of residents of Oyama were under 15 (20,940 children) and 60.7% were aged 15 to 64 at the 2020 census; nationally the shares were 11.9% and 57.8%.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many households are there in Oyama?
Oyama had 69,624 households at the 2020 census, of which 69,512 were private households; that is about 2.39 residents per household (residents divided by all households).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many foreigners live in Oyama?
6,034 foreign nationals lived in Oyama at the 2020 census, 3.6% of residents, above the national figure (1.9%).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many babies are born in Oyama each year?
Oyama recorded 1,003 births and 1,788 deaths in 2023, a natural decrease of 785. That is 6.0 births and 10.7 deaths per 1,000 residents (national: 5.8 and 12.5). Births are by Japanese nationals registered in the city.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyAre more people moving into or out of Oyama?
In 2024, 6,741 people moved into Oyama from other municipalities and 6,326 moved out, a net gain of 415 (moves within the city and from abroad are not counted).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many marriages are there in Oyama each year?
Oyama registered 644 marriages and 259 divorces by Japanese nationals in 2023, or 3.9 marriages per 1,000 residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyWho runs Oyama?
In Japan, cities and towns are run by municipalities: Mayor and municipal assembly both directly elected for four years. Primary and lower secondary schools, welfare, waste, water, residents' registers, disaster response. Large 'designated cities' (20) take on prefectural tasks and are divided into administrative wards whose heads are officials, not elected.
How local power works in Japan
Cities of a similar size in Japan
- Tachikawa 183,581
- Uji 179,630
- Narashino 176,197
- Hitachi 174,508
- Izumo 172,775
- Kamakura 172,710
- Urayasu 171,362
- Tomakomai 170,113
- Nishio 169,046
- Sakura 168,743
- Hirosaki 168,466
- Iwata 166,672
- Obihiro 166,536
- Takaoka 166,393
- Niiza 166,017
- Kushiro 165,077
Up a level: all cities in Japan · Japan · government and power
Sources
- Statistics Bureau of Japan, Ministry of Internal Affairs and Communications: Statistical Observations of Municipalities 2026 (social and demographic statistics, city, ward, town and village data), read 28 October 2026 · saved copy (SHA-256 2cb3d8c51aa1…)
- Statistics Bureau of Japan, Ministry of Internal Affairs and Communications: Statistical Observations of Prefectures 2026 (national figures, "All Japan" row), read 28 October 2026 · saved copy (SHA-256 b69774a5f40c…)
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