Onojo: population and official figures
In depth
- Economy, jobs and prices in Onojo: Taxable income for municipal resident tax in Onojo averaged 3.90 million yen per taxpayer in fiscal 2024, 74th 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 Onojo: Onojo had 7 general hospitals (hospitals other than psychiatric ones) in 2023, or 6.86 per 100,000 residents, 68th highest of 262 cities, above the national figure (5.60).
- Education in Onojo: Onojo had 10 primary schools with 6,401 pupils and 376 full-time teachers in May 2024.
- Poverty and living standards in Onojo: 32.8% of private households in Onojo were one-person households at the 2020 census (14,039), 93rd lowest of 262 cities, below the national figure (38.0%).
- Government budget and revenue in Onojo: The municipal government of Onojo took in 42.5 billion yen in fiscal 2022 (final accounts), 415,967 yen per resident, 76th lowest of 262 cities.
What is the population of Onojo?
Onojo had 102,085 residents at the 1 October 2020 census (city proper). That is 9th lowest of 262 cities. The count includes foreign residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow big is Onojo and how densely populated is it?
Onojo covers 26.89 square kilometres (2024), of which 16.75 is habitable land. That is 3,796 people per square kilometre of total area at the 2020 census, 71st highest of 262 for density.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyIs the population of Onojo growing or shrinking?
The basic resident register recorded 103,537 residents in Onojo in 2024, 1.4% 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 Onojo?
15.3% of residents of Onojo were under 15 (15,654 children) and 60.3% 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 Onojo?
Onojo had 42,781 households at the 2020 census, of which 42,738 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 Onojo?
783 foreign nationals lived in Onojo at the 2020 census, 0.8% of residents, below the national figure (1.9%).
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyHow many babies are born in Onojo each year?
Onojo recorded 935 births and 899 deaths in 2023, a natural increase of 36. That is 9.2 births and 8.8 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 Onojo?
In 2024, 5,566 people moved into Onojo from other municipalities and 5,565 moved out, a net gain of 1 (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 Onojo each year?
Onojo registered 434 marriages and 151 divorces by Japanese nationals in 2023, or 4.3 marriages per 1,000 residents.
Source: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications · saved copyWho runs Onojo?
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
- Sanda 109,238
- Habikino 108,736
- Tondabayashi 108,699
- Mishima 107,783
- Tajimi 106,732
- Kiryu 106,445
- Komatsu 106,216
- Ikeda 104,993
- Saijo 104,791
- Toride 104,524
- Chikushino 103,311
- Inzai 102,609
- Isehara 101,780
- Kawachinagano 101,692
- Kanoya 101,096
- Chikusei 100,753
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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