Most populated municipalities

The 20 municipalities in Ibaraki Ken with the most residents, and the 20 with the fewest, out of 48 with a published figure.

	Municipality	Prefecture	Postal code	Residents
1	Osaka Prefecture	Ibaraki Ken	311-4316	8,826,684
2	Ibaraki Prefecture	Ibaraki Ken	311-3100	2,862,372
3	Sakai	Ibaraki Ken	306-0400	824,408
4	Yokosuka	Ibaraki Ken	300-1604	390,275
5	Mito	Ibaraki Ken	310-8520	270,445
6	Nagaoka	Ibaraki Ken	311-3116	265,868
7	Tsukuba	Ibaraki Ken	305-0012	246,647
8	Hitachi	Ibaraki Ken	317-0065	172,709
9	Hitachinaka	Ibaraki Ken	312-0002	154,311
10	Wakabayashi-ku	Ibaraki Ken	306-0417	139,052
11	Tsuchiura	Ibaraki Ken	300-0812	137,825
12	Toride	Ibaraki Ken	302-0000	103,908
13	Chikusei	Ibaraki Ken	308-0126	98,384
14	Kamisu	Ibaraki Ken	314-0143	95,471
15	Ushiku	Ibaraki Ken	300-1225	84,505
16	Ryūgasaki-shi	Ibaraki Ken	301-0812	76,055
17	Kasama	Ibaraki Ken	309-1712	73,521
18	Ishioka	Ibaraki Ken	315-0105	71,851
19	Moriya	Ibaraki Ken	302-0116	68,992
20	Kashima	Ibaraki Ken	314-0016	67,001

Least populated municipalities

	Municipality	Prefecture	Postal code	Residents
1	Goka	Ibaraki Ken	306-0300	8,125
2	Kuriyama	Ibaraki Ken	306-0412	11,474
3	Tone	Ibaraki Ken	300-1600	15,035
4	Ōarai-machi	Ibaraki Ken	311-1300	15,696
5	Shirosato	Ibaraki Ken	311-4300	17,916
6	Iwafune	Ibaraki Ken	311-4331	18,275
7	Takahagi	Ibaraki Ken	318-0024	27,251
8	Itako	Ibaraki Ken	311-2425	27,373
9	Koshu	Ibaraki Ken	306-0304	29,017
10	Namegata	Ibaraki Ken	311-3800	31,828
11	Kuji	Ibaraki Ken	319-3534	32,813
12	Awa	Ibaraki Ken	311-4321	34,569
13	Sakuragawa	Ibaraki Ken	309-1227	38,677
14	Hitachiōmiya-shi	Ibaraki Ken	319-2254	38,836
15	Inashiki	Ibaraki Ken	300-0611	38,853
16	Kasumigaura	Ibaraki Ken	315-0053	39,993
17	Kitaibaraki City	Ibaraki Ken	319-1556	41,352
18	Shimotsuma	Ibaraki Ken	304-0053	41,499
19	Kitakata	Ibaraki Ken	311-4325	45,590
20	Hokota	Ibaraki Ken	311-1516	45,910

Most populated municipalities — 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.