Oita population pyramid 2045

Name: Population of Oita by sex and five-year age group, 2020–2050
Creator: National Institute of Population and Social Security Research

Projection

◀2045▶

Population: 888,208
Aged 0–14: 10.4%
Aged 15–64: 49.8%
Aged 65+: 39.8%
Aged 75+: 23.9%
vs 2020: -21.0%

Population by sex and five-year age group (men left, women right). The axis is fixed across 2020–2050 so years can be compared.

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<iframe src="https://pyramid.0xkaz.com/embed/jp/44/2045" title="Oitaの人口ピラミッド（2045年）" loading="lazy" style="width:100%;max-width:720px;aspect-ratio:720/615;border:0"></iframe>
<p><a href="https://pyramid.0xkaz.com/jp/44/2045">Oitaの人口ピラミッド（2045年）</a></p>

Population by sex and age group, 2020–2050 (CSV)

Data may be reused with attribution to the original sources (UN, World Bank, etc.).

Oita at a glance

In 2045 the population of Oita is projected to be 888,208: 10.4% aged 0–14, 49.8% aged 15–64 and 39.8% aged 65 and over (23.9% aged 75+).

From 1.1 million in 2020 it is projected to shrink by 25.1% to 841,343 in 2050; the share aged 65+ rises from 33.3% to 40.5%.

Among the 47 prefectures, it ranks 16th smallest by population in 2045, 22nd largest by the size of the decline from 2020 to 2050, and 22nd highest by the share aged 65+ in 2050.

The future of Oita, compared

	2020	2050	Change	65+ (2020)	65+ (2050)	0–14 (2050)
Oita	1.1 million	841,343	-25.1%	33.3%	40.5%	10.4%
Japan	126.1 million	104.7 million	-17.0%	28.6%	37.1%	9.9%

Trends 2020–2050

Population

Share aged 65+ (%)

Municipalities of Oita

Municipality pages are in Japanese.

Municipality	2020	2050	Change	65+ (2050)
大分市	475,614	415,875	-12.6%	36.7%
別府市	115,321	84,031	-27.1%	41.2%
中津市	82,863	69,547	-16.1%	35.8%
日田市	62,657	38,839	-38.0%	45.9%
佐伯市	66,851	35,779	-46.5%	52.7%
臼杵市	36,158	19,842	-45.1%	51.8%
津久見市	16,100	6,800	-57.8%	57.0%
竹田市	20,332	9,699	-52.3%	54.3%
豊後高田市	22,112	15,895	-28.1%	42.1%
杵築市	27,999	16,456	-41.2%	50.3%
宇佐市	52,771	35,431	-32.9%	43.4%
豊後大野市	33,695	18,093	-46.3%	52.7%
由布市	32,772	25,542	-22.1%	38.1%
国東市	26,232	14,119	-46.2%	53.7%
姫島村	1,725	558	-67.7%	72.4%
日出町	27,723	23,163	-16.4%	39.0%
九重町	8,541	4,159	-51.3%	53.3%
玖珠町	14,386	7,515	-47.8%	50.6%

Municipalities of Oita with the largest decline (2020→2050)

姫島村（-67.7%）
津久見市（-57.8%）
竹田市（-52.3%）
九重町（-51.3%）
玖珠町（-47.8%）
佐伯市（-46.5%）
豊後大野市（-46.3%）
国東市（-46.2%）
臼杵市（-45.1%）
杵築市（-41.2%）

Source: processed from the National Institute of Population and Social Security Research, Regional Population Projections for Japan (2023) (https://www.ipss.go.jp/pp-shicyoson/j/shicyoson23/t-page.asp). 2020 is the census; 2025 onwards are projections.