Kōchi

Prefecture in Japan

Contents: Subdivision

The population development in Kōchi as well as related information and services (Wikipedia, Google, images).

The Details icon links to further information about a selected division including its population structure (gender, age groups, age distribution, citizenship).

Name	Status	Native	Population Census 1995-10-01	Population Census 2000-10-01	Population Census 2005-10-01	Population Census 2010-10-01	Population Census 2015-10-01	Population Census 2020-10-01	Population Census 2025-10-01
Kōchi	Prefecture	高知県	816,704	813,949	796,292	764,456	728,276	691,527	643,437
Agawa	District (-gun)	吾川郡	38,998	36,918	34,415	31,562	28,318	26,201	23,705	→
Aki	City (-shi)	安芸市	22,377	21,321	20,348	19,547	17,577	16,243	14,625	→
Aki	District (-gun)	安芸郡	23,035	21,773	20,502	18,819	17,249	15,681	14,150	→
Hata	District (-gun)	幡多郡	24,432	23,035	21,682	19,830	17,886	16,133	14,118	→
Kami	City (-shi)	香美市	31,023	31,175	30,257	28,766	27,513	26,513	24,423	→
Kōchi	City (-shi)	高知市	339,864	348,979	348,990	343,393	337,190	326,545	309,383	→
Kōnan	City (-shi)	香南市	31,481	32,659	33,541	33,830	32,961	32,207	31,293	→
Muroto	City (-shi)	室戸市	21,430	19,472	17,490	15,210	13,524	11,742	9,650	→
Nagaoka	District (-gun)	長岡郡	11,880	11,035	9,866	8,822	7,535	6,513	5,783	→
Nankoku	City (-shi)	南国市	48,245	49,965	50,758	49,472	47,982	46,664	45,413	→
Shimanto	City (-shi)	四万十市	38,991	38,784	37,917	35,933	34,313	32,694	30,502	→
Sukumo	City (-shi)	宿毛市	25,919	25,970	24,397	22,610	20,907	19,033	17,239	→
Susaki	City (-shi)	須崎市	28,742	27,569	26,039	24,698	22,606	20,590	18,310	→
Takaoka	District (-gun)	高岡郡	74,010	70,840	67,628	62,480	57,506	52,529	46,847	→
Tosa	City (-shi)	土佐市	30,723	30,338	30,011	28,686	27,038	25,732	23,839	→
Tosa	District (-gun)	土佐郡	5,972	5,604	5,170	4,769	4,393	4,119	3,769	→
Tosashimizu	City (-shi)	土佐清水市	19,582	18,512	17,281	16,029	13,778	12,388	10,388	→
Nippon [Japan]	State	日本国	125,570,246	126,925,843	127,767,994	128,057,352	127,094,745	126,146,099	123,049,524

Source: Statistics Bureau Japan.

Explanation: The 2025 census results are preliminary.

Further information about the population structure:

Gender (C 2025)
Males	304,171
Females	339,266

Age Groups (C 2020)
0-17 years	93,701
18-64 years	343,445
65+ years	241,787

Age Distribution (C 2020)
90+ years	21,580
80-89 years	63,766
70-79 years	104,537
60-69 years	96,995
50-59 years	83,560
40-49 years	90,551
30-39 years	63,702
20-29 years	49,897
10-19 years	57,003
0-9 years	47,342

Citizenship (C 2020)
Japan	677,762
Foreign Citizenship	4,220

Contents: Subdivision

Further information about the population structure:

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