Japan: Kōchi

flag Contents: Kōchi (Prefecture)

Capital: Kōchi

691,527 Population [2020] – census

643,437 Population [2025] – census

7,102km² Area

90.60/km² Density [2025]

Prefecture

The population of Kōchi prefecture.

Name	Native	Status	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	高知県	Prefecture	816,704	813,949	796,292	764,456	728,276	691,527	643,437

Contents: Cities, Towns and Villages

The population of all cities, towns and villages in Kōchi prefecture.

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

Name	Native	Status	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
Aki	安芸市	City (-shi)	22,377	21,321	20,348	19,547	17,577	16,243	14,625	→
Geisei	芸西村	Village (-mura)	4,383	4,366	4,208	4,048	3,858	3,694	3,553	→
Hidaka	日高村	Village (-mura)	6,105	5,968	5,895	5,447	5,030	4,812	4,414	→
Ino	いの町	Town (-chō)	30,079	28,729	27,068	25,062	22,767	21,374	19,690	→
Kami	香美市	City (-shi)	31,023	31,175	30,257	28,766	27,513	26,513	24,423	→
Kitagawa	北川村	Village (-mura)	1,650	1,591	1,478	1,367	1,294	1,146	1,090	→
Kōchi	高知市	City (-shi)	339,864	348,979	348,990	343,393	337,190	326,545	309,383	→
Kōnan	香南市	City (-shi)	31,481	32,659	33,541	33,830	32,961	32,207	31,293	→
Kuroshio	黒潮町	Town (-chō)	15,024	14,208	13,437	12,366	11,217	10,262	8,945	→
Mihara	三原村	Village (-mura)	1,986	1,871	1,808	1,681	1,574	1,437	1,274	→
Motoyama	本山町	Town (-chō)	4,901	4,657	4,374	4,103	3,573	3,261	3,022	→
Muroto	室戸市	City (-shi)	21,430	19,472	17,490	15,210	13,524	11,742	9,650	→
Nahari	奈半利町	Town (-chō)	4,291	4,027	3,727	3,542	3,326	3,034	2,724	→
Nakatosa	中土佐町	Town (-chō)	9,321	8,722	8,320	7,605	6,840	6,002	5,307	→
Nankoku	南国市	City (-shi)	48,245	49,965	50,758	49,472	47,982	46,664	45,413	→
Niyodogawa	仁淀川町	Town (-chō)	8,919	8,189	7,347	6,500	5,551	4,827	4,015	→
Ochi	越知町	Town (-chō)	7,803	7,411	6,952	6,374	5,795	5,187	4,430	→
Ōkawa	大川村	Village (-mura)	680	569	538	411	396	366	339	→
Ōtoyo	大豊町	Town (-chō)	6,979	6,378	5,492	4,719	3,962	3,252	2,761	→
Ōtsuki	大月町	Town (-chō)	7,422	6,956	6,437	5,783	5,095	4,434	3,899	→
Sakawa	佐川町	Town (-chō)	15,148	14,777	14,447	13,951	13,114	12,323	11,256	→
Shimanto	四万十市	City (-shi)	38,991	38,784	37,917	35,933	34,313	32,694	30,502	→
Shimanto	四万十町	Town (-chō)	23,081	21,844	20,527	18,712	17,325	15,607	13,855	→
Sukumo	宿毛市	City (-shi)	25,919	25,970	24,397	22,610	20,907	19,033	17,239	→
Susaki	須崎市	City (-shi)	28,742	27,569	26,039	24,698	22,606	20,590	18,310	→
Tano	田野町	Town (-chō)	3,575	3,315	3,236	2,932	2,733	2,498	2,263	→
Tosa	土佐市	City (-shi)	30,723	30,338	30,011	28,686	27,038	25,732	23,839	→
Tosa	土佐町	Town (-chō)	5,292	5,035	4,632	4,358	3,997	3,753	3,430	→
Tosashimizu	土佐清水市	City (-shi)	19,582	18,512	17,281	16,029	13,778	12,388	10,388	→
Tōyō	東洋町	Town (-chō)	4,068	3,744	3,386	2,947	2,584	2,194	1,849	→
Tsuno	津野町	Town (-chō)	7,554	7,258	6,862	6,407	5,794	5,291	4,676	→
Umaji	馬路村	Village (-mura)	1,242	1,195	1,170	1,013	823	745	649	→
Yasuda	安田町	Town (-chō)	3,826	3,535	3,297	2,970	2,631	2,370	2,022	→
Yusuhara	檮原町	Town (-chō)	4,998	4,860	4,625	3,984	3,608	3,307	2,909	→

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