Japan: Okayama

flag Contents: Okayama (Prefecture)

Capital: Okayama

1,888,432 Population [2020] – census

1,808,664 Population [2025] – census

7,114km² Area

254.2/km² Density [2025]

Prefecture

The population of Okayama 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
Okayama	岡山県	Prefecture	1,950,750	1,950,828	1,957,264	1,945,276	1,921,525	1,888,432	1,808,664

Contents: Cities, Towns and Villages

The population of all cities, towns and villages in Okayama 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
Akaiwa	赤磐市	City (-shi)	43,011	43,813	43,913	43,458	43,214	42,661	40,948	→
Asakuchi	浅口市	City (-shi)	38,595	37,724	37,327	36,114	34,235	32,772	30,298	→
Bizen	備前市	City (-shi)	44,855	42,534	40,241	37,839	35,179	32,320	28,619	→
Hayashima	早島町	Town (-chō)	11,562	11,915	11,921	12,214	12,154	12,368	12,581	→
Ibara	井原市	City (-shi)	47,647	46,489	45,104	43,927	41,390	38,384	35,338	→
Kagamino	鏡野町	Town (-chō)	15,731	15,091	14,059	13,580	12,847	12,062	11,131	→
Kasaoka	笠岡市	City (-shi)	60,478	59,300	57,272	54,225	50,568	46,088	41,404	→
Kibichūō	吉備中央町	Town (-chō)	15,507	14,651	14,040	13,033	11,950	10,886	9,913	→
Kumenan	久米南町	Town (-chō)	6,266	6,115	5,690	5,296	4,907	4,530	4,042	→
Kurashiki	倉敷市	City (-shi)	453,618	460,869	469,377	475,513	477,118	474,592	462,135	→
Maniwa	真庭市	City (-shi)	56,607	54,747	51,782	48,964	46,124	42,725	38,482	→
Mimasaka	美作市	City (-shi)	36,140	34,577	32,479	30,498	27,977	25,939	23,181	→
Misaki	美咲町	Town (-chō)	18,254	17,562	16,577	15,642	14,432	13,053	11,629	→
Nagi	奈義町	Town (-chō)	7,230	6,690	6,475	6,085	5,906	5,578	5,100	→
Niimi	新見市	City (-shi)	39,891	38,492	36,073	33,870	30,658	28,079	24,900	→
Nishiawakura	西粟倉村	Village (-son)	1,902	1,831	1,684	1,520	1,472	1,398	1,245	→
Okayama	岡山市	City (-shi)	663,346	674,375	696,172	709,584	719,474	724,691	707,916	→
Satoshō	里庄町	Town (-chō)	10,583	10,782	10,823	10,916	10,929	10,950	10,435	→
Setouchi	瀬戸内市	City (-shi)	39,228	39,403	39,081	37,852	36,975	36,048	34,668	→
Shinjō	新庄村	Village (-son)	1,101	1,051	1,019	957	866	813	711	→
Shōō	勝央町	Town (-chō)	11,669	11,428	11,263	11,195	11,125	10,888	10,388	→
Sōja	総社市	City (-shi)	65,437	66,201	66,584	66,201	66,855	69,030	68,722	→
Takahashi	高梁市	City (-shi)	43,115	41,077	38,799	34,963	32,075	29,072	25,600	→
Tamano	玉野市	City (-shi)	71,330	69,567	67,047	64,588	60,736	56,531	51,975	→
Tsuyama	津山市	City (-shi)	113,617	111,499	110,569	106,788	103,746	99,937	92,611	→
Wake	和気町	Town (-chō)	17,227	16,815	16,180	15,362	14,412	13,623	12,336	→
Yakage	矢掛町	Town (-chō)	16,803	16,230	15,713	15,092	14,201	13,414	12,356	→

Source: Statistics Bureau Japan.

Explanation: The 2025 census results are preliminary.

Further information about the population structure:

Gender (C 2025)
Males	868,734
Females	939,930

Age Groups (C 2020)
0-17 years	281,305
18-64 years	980,441
65+ years	557,991

Age Distribution (C 2020)
90+ years	43,192
80-89 years	143,766
70-79 years	251,096
60-69 years	228,828
50-59 years	218,862
40-49 years	252,134
30-39 years	192,053
20-29 years	172,023
10-19 years	170,509
0-9 years	147,274

Citizenship (C 2020)
Japan	1,810,900
Foreign Citizenship	25,116