Largest municipalities by area

The 20 municipalities in Okayama Ken with the highest area, and the 20 with the lowest, out of 45 with a published figure.

	Municipality	Prefecture	Postal code	Area
1	Seto	Okayama Ken	708-0325	111,610,000.0 km²
2	Okayama Prefecture	Okayama Ken	701-1522	7,113.2 km²
3	Kōchi Prefecture	Okayama Ken	708-0431	7,103.9 km²
4	Takayama	Okayama Ken	708-0345	2,177.7 km²
5	Osaka Prefecture	Okayama Ken	708-1302	1,905.3 km²
6	Maniwa	Okayama Ken	717-0733	828.5 km²
7	Niimi	Okayama Ken	718-8501	793.3 km²
8	Ōmachi-shi	Okayama Ken	708-0303	565.1 km²
9	Takahashi	Okayama Ken	716-0101	547.0 km²
10	Tsuyama	Okayama Ken	708-1102	506.3 km²
11	Ōda-shi	Okayama Ken	714-1214	435.7 km²
12	Mimasaka	Okayama Ken	707-0203	429.3 km²
13	Kagamino	Okayama Ken	708-0300	419.7 km²
14	Nishikawa	Okayama Ken	709-3498	393.2 km²
15	Nagato	Okayama Ken	708-0502	357.9 km²
16	Kurashiki	Okayama Ken	710-8601	355.6 km²
17	Kaga	Okayama Ken	709-2661	305.9 km²
18	Kusu	Okayama Ken	708-0705	286.6 km²
19	Bizen	Okayama Ken	705-0132	258.1 km²
20	Ibara	Okayama Ken	714-2341	243.5 km²

Smallest municipalities by area

	Municipality	Prefecture	Postal code	Area
1	Ōji-chō	Okayama Ken	708-1525	7.0 km²
2	Hayashima	Okayama Ken	701-0304	7.6 km²
3	Kita-ku	Okayama Ken	709-3494	16.9 km²
4	Ōki-machi	Okayama Ken	708-0322	18.4 km²
5	Nishi-ku	Okayama Ken	709-3405	35.6 km²
6	Yao	Okayama Ken	701-0398	41.7 km²
7	Hara	Okayama Ken	708-0344	43.3 km²
8	Kawara	Okayama Ken	709-4302	44.5 km²
9	Misaki	Okayama Ken	709-3700	49.2 km²
10	Shōō-chō	Okayama Ken	709-4300	54.0 km²
11	Nishiawakura	Okayama Ken	707-0500	58.0 km²
12	Kōge-machi	Okayama Ken	708-1526	62.4 km²
13	Asakuchi	Okayama Ken	719-0234	66.5 km²
14	Nagi	Okayama Ken	708-1300	69.5 km²
15	Kumenan	Okayama Ken	709-3600	78.7 km²
16	Naka	Okayama Ken	709-3407	97.8 km²
17	Minami-ku	Okayama Ken	709-3402	100.9 km²
18	Tamano	Okayama Ken	706-0221	103.6 km²
19	Mino	Okayama Ken	709-4306	117.0 km²
20	Kasaoka	Okayama Ken	714-0055	136.4 km²

Largest municipalities by area — All of Japan

One row per municipalities. The figures are published by municipality, so every postal code inside one shares them; the postal code shown is one of that municipality's.