Sanmu (山武市)

City

Chiba (千葉) — 2025 — Based on Basic Resident Register

Total Population

47,745

-624 (-1.29%)

Young (0–14)

7.9%

3,794

Working Age (15–64)

54.3%

25,948

Aging Rate

37.7%

18,003

Population Trends (2006–2025)

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

Category	Total	Male	Female
Total	47,745	24,311	23,434
Young (0–14)	3,794	1,993	1,801
Working Age (15–64)	25,948	14,036	11,912
Elderly (65+)	18,003	8,282	9,721

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	47,745	3,794	25,948	18,003	37.7%
2024	48,369	3,984	26,335	18,050	37.3%
2023	49,103	4,134	26,892	18,077	36.8%
2022	49,491	4,270	27,256	17,965	36.3%
2021	50,336	4,410	28,128	17,798	35.4%
2020	51,176	4,617	29,042	17,517	34.2%
2019	51,935	4,811	29,734	17,390	33.5%
2018	52,701	4,965	30,591	17,145	32.5%
2017	53,435	5,168	31,421	16,846	31.5%
2016	54,139	5,353	32,298	16,488	30.5%
2015	54,904	5,559	33,308	16,037	29.2%
2014	55,783	5,799	34,433	15,551	27.9%
2013	56,295	5,987	35,039	15,269	27.1%
2012	56,474	6,205	35,571	14,698	26.0%
2011	57,223	6,535	36,300	14,388	25.1%
2010	57,730	6,731	36,664	14,335	24.8%
2009	58,275	6,999	37,129	14,147	24.3%
2008	59,029	7,288	37,930	13,811	23.4%
2007	59,601	7,601	38,477	13,523	22.7%
2006	60,143	7,988	38,912	13,243	22.0%