Most densely populated municipalities

The 20 municipalities in Nagano Ken with the highest people per km², and the 20 with the lowest, out of 83 with a published figure.

	Municipality	Prefecture	Postal code	People per km²
1	Nakano	Nagano Ken	383-0046	21,873.9 /km²
2	Itabashi	Nagano Ken	384-1304	18,042.7 /km²
3	Nakahara-ku	Nagano Ken	382-0804	17,894.2 /km²
4	Chūō	Nagano Ken	399-0493	16,569.9 /km²
5	Kasuga	Nagano Ken	395-0301	7,938.9 /km²
6	Sakae-ku	Nagano Ken	389-2700	6,460.2 /km²
7	Fujisawa	Nagano Ken	384-2302	6,278.7 /km²
8	Sakai	Nagano Ken	399-7711	5,502.3 /km²
9	Tōgō-chō	Nagano Ken	386-1603	2,444.0 /km²
10	Asahi	Nagano Ken	390-1100	1,848.1 /km²
11	Yoshida	Nagano Ken	399-3102	1,389.8 /km²
12	Toyosato	Nagano Ken	389-2502	940.6 /km²
13	Nakagawa	Nagano Ken	399-3800	669.2 /km²
14	Okaya	Nagano Ken	394-0051	558.2 /km²
15	Obuse	Nagano Ken	381-0201	549.7 /km²
16	Toyono	Nagano Ken	389-1212	524.5 /km²
17	Chikuma	Nagano Ken	387-8512	490.5 /km²
18	Miyaki	Nagano Ken	399-0426	488.9 /km²
19	Suwa	Nagano Ken	393-0013	442.5 /km²
20	Komoro	Nagano Ken	384-0052	416.7 /km²

Most sparsely populated municipalities

	Municipality	Prefecture	Postal code	People per km²
1	Matsumoto	Nagano Ken	390-8502	0.0 /km²
2	Ōshika-mura	Nagano Ken	399-3500	3.7 /km²
3	Otari	Nagano Ken	399-9400	9.7 /km²
4	Ikeda	Nagano Ken	399-8601	11.7 /km²
5	Kawakami	Nagano Ken	389-1226	18.3 /km²
6	Kiso	Nagano Ken	399-5303	21.9 /km²
7	Minamimaki	Nagano Ken	384-1300	23.0 /km²
8	Kosaka	Nagano Ken	389-1227	23.2 /km²
9	Tenryū-ku	Nagano Ken	399-1200	28.0 /km²
10	Achi	Nagano Ken	395-0300	28.2 /km²
11	Nagawa	Nagano Ken	386-0600	30.3 /km²
12	Takamori	Nagano Ken	399-3100	32.7 /km²
13	Nakanojō	Nagano Ken	389-0602	34.6 /km²
14	Ōno-shi	Nagano Ken	399-0601	34.9 /km²
15	Ōi-chō	Nagano Ken	389-1316	37.7 /km²
16	Takayama	Nagano Ken	382-0800	39.1 /km²
17	Ogawa	Nagano Ken	395-1107	39.4 /km²
18	Chikuhoku	Nagano Ken	399-7500	41.3 /km²
19	Kijimadaira	Nagano Ken	389-2300	42.9 /km²
20	Hakuba	Nagano Ken	399-9300	45.5 /km²

Most densely 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.