Iwanai (岩内町)

Town

Hokkaido (北海道) — 2025 — Based on Basic Resident Register

Total Population

10,913

-181 (-1.63%)

Young (0–14)

8.1%

888

Working Age (15–64)

53.3%

5,816

Aging Rate

38.6%

4,209

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	10,913	5,177	5,736
Young (0–14)	888	458	430
Working Age (15–64)	5,816	3,038	2,778
Elderly (65+)	4,209	1,681	2,528

Year	Total Population	0–14	15–64	65+	Aging Rate
2025	10,913	888	5,816	4,209	38.6%
2024	11,094	929	5,874	4,291	38.7%
2023	11,343	996	5,996	4,351	38.4%
2022	11,658	1,062	6,160	4,436	38.1%
2021	11,983	1,108	6,375	4,500	37.6%
2020	12,314	1,148	6,626	4,540	36.9%
2019	12,623	1,220	6,837	4,566	36.2%
2018	12,931	1,273	7,023	4,590	35.5%
2017	13,180	1,338	7,269	4,538	34.4%
2016	13,428	1,382	7,476	4,537	33.8%
2015	13,770	1,439	7,763	4,534	32.9%
2014	14,146	1,494	8,131	4,489	31.7%
2013	14,319	1,528	8,253	4,506	31.5%
2012	14,595	1,593	8,501	4,501	30.8%
2011	14,874	1,659	8,742	4,473	30.1%
2010	15,086	1,725	8,857	4,504	29.9%
2009	15,437	1,833	9,099	4,505	29.2%
2008	15,763	1,926	9,375	4,462	28.3%
2007	16,061	2,001	9,638	4,422	27.5%
2006	16,354	2,118	9,870	4,366	26.7%
2005	16,386	2,124	9,992	4,270	26.1%
2004	16,573	2,132	10,217	4,224	25.5%
2003	16,839	2,196	10,546	4,097	24.3%
2002	17,117	2,288	10,831	3,998	23.4%
2001	17,201	2,334	10,989	3,878	22.5%
2000	17,305	2,397	11,169	3,739	21.6%
1999	17,615	2,513	11,429	3,673	20.9%
1998	17,681	2,561	11,544	3,576	20.2%
1997	17,911	2,652	11,802	3,457	19.3%
1996	18,145	2,745	12,075	3,325	18.3%
1995	18,327	2,815	12,274	3,238	17.7%