Setochi (瀬戸内市)

City

Okayama (岡山) — 2025 — Based on Basic Resident Register

Total Population

36,160

-324 (-0.89%)

Young (0–14)

11.1%

4,011

Working Age (15–64)

54.6%

19,747

Aging Rate

34.3%

12,402

Population Trends (2005–2025)

* Data before 2012 includes Japanese residents only (foreign residents were added to the Basic Resident Register in July 2012)

Category	Total	Male	Female
Total	36,160	17,559	18,601
Young (0–14)	4,011	2,167	1,844
Working Age (15–64)	19,747	10,002	9,745
Elderly (65+)	12,402	5,390	7,012

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	36,160	4,011	19,747	12,402	34.3%
2024	36,484	4,141	19,899	12,444	34.1%
2023	36,525	4,124	19,935	12,466	34.1%
2022	36,667	4,138	19,946	12,583	34.3%
2021	37,049	4,171	20,322	12,556	33.9%
2020	37,268	4,181	20,561	12,526	33.6%
2019	37,411	4,256	20,674	12,481	33.4%
2018	37,741	4,289	20,970	12,482	33.1%
2017	37,975	4,388	21,172	12,415	32.7%
2016	38,252	4,434	21,533	12,285	32.1%
2015	38,524	4,539	21,939	12,046	31.3%
2014	38,754	4,604	22,398	11,752	30.3%
2013	38,962	4,678	22,731	11,553	29.7%
2012	38,861	4,790	22,942	11,129	28.6%
2011	38,967	4,872	23,130	10,965	28.1%
2010	39,092	4,888	23,224	10,980	28.1%
2009	39,281	4,966	23,442	10,873	27.7%
2008	39,619	5,154	23,848	10,617	26.8%
2007	39,770	5,228	24,096	10,446	26.3%
2006	39,960	5,352	24,385	10,223	25.6%
2005	40,295	5,529	24,710	10,056	25.0%