Sosa (匝瑳市)

City

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

Total Population

33,294

-503 (-1.49%)

Young (0–14)

8.7%

2,900

Working Age (15–64)

54.2%

18,049

Aging Rate

37.1%

12,343

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	33,294	16,613	16,681
Young (0–14)	2,900	1,524	1,376
Working Age (15–64)	18,049	9,562	8,487
Elderly (65+)	12,343	5,527	6,816

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	33,294	2,900	18,049	12,343	37.1%
2024	33,797	3,061	18,376	12,357	36.6%
2023	34,338	3,224	18,714	12,397	36.1%
2022	34,932	3,403	19,088	12,438	35.6%
2021	35,542	3,540	19,595	12,404	34.9%
2020	36,121	3,677	20,075	12,367	34.2%
2019	36,642	3,810	20,481	12,349	33.7%
2018	37,207	3,946	21,021	12,238	32.9%
2017	37,709	4,072	21,517	12,118	32.1%
2016	38,197	4,196	22,106	11,894	31.1%
2015	38,755	4,322	22,747	11,686	30.2%
2014	39,235	4,401	23,441	11,393	29.0%
2013	39,454	4,475	23,791	11,188	28.4%
2012	39,590	4,577	24,084	10,929	27.6%
2011	40,039	4,688	24,620	10,731	26.8%
2010	40,345	4,824	24,718	10,803	26.8%
2009	40,736	4,932	25,048	10,756	26.4%
2008	41,153	5,056	25,459	10,638	25.8%
2007	41,572	5,194	25,797	10,581	25.5%
2006	41,930	5,296	26,154	10,480	25.0%