Usuki (臼杵市)

City

Oita (大分) — 2025 — Based on Basic Resident Register

Total Population

34,895

-725 (-2.04%)

Young (0–14)

9.3%

3,241

Working Age (15–64)

48.3%

16,859

Aging Rate

42.4%

14,795

Population Trends (1995–2025)

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

Category	Total	Male	Female
Total	34,895	16,614	18,281
Young (0–14)	3,241	1,665	1,576
Working Age (15–64)	16,859	8,657	8,202
Elderly (65+)	14,795	6,292	8,503

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	34,895	3,241	16,859	14,795	42.4%
2024	35,620	3,381	17,294	14,945	42.0%
2023	36,137	3,489	17,595	15,053	41.7%
2022	36,830	3,629	17,971	15,230	41.4%
2021	37,610	3,771	18,621	15,218	40.5%
2020	38,231	3,889	19,189	15,153	39.6%
2019	38,761	4,022	19,603	15,136	39.0%
2018	39,367	4,139	20,128	15,100	38.4%
2017	39,952	4,281	20,602	15,069	37.7%
2016	40,443	4,405	21,098	14,940	36.9%
2015	41,017	4,566	21,743	14,708	35.9%
2014	41,486	4,639	22,424	14,423	34.8%
2013	41,843	4,762	22,974	14,107	33.7%
2012	42,323	4,850	23,736	13,737	32.5%
2011	42,831	4,901	24,365	13,565	31.7%
2010	43,158	4,931	24,624	13,603	31.5%
2009	43,569	5,024	25,053	13,492	31.0%
2008	44,038	5,081	25,615	13,342	30.3%
2007	44,617	5,209	26,166	13,242	29.7%
2006	45,007	5,254	26,656	13,097	29.1%
2005	45,295	5,339	27,021	12,935	28.6%
2004	36,080	4,410	21,887	9,783	27.1%
2003	36,320	4,478	22,106	9,736	26.8%
2002	36,505	4,555	22,387	9,563	26.2%
2001	36,780	4,671	22,721	9,388	25.5%
2000	36,956	4,765	23,052	9,139	24.7%
1999	37,070	4,940	23,248	8,882	24.0%
1998	37,268	5,074	23,472	8,722	23.4%
1997	37,410	5,191	23,843	8,376	22.4%
1996	37,631	5,426	24,136	8,069	21.4%
1995	37,938	5,641	24,469	7,828	20.6%