There are cities, towns and villages of 21 in Nagasaki Prefecture, and the number is the 37th in the country.
A cities, towns and villages list and population ranking of Nagasaki Prefecture
| Cities, towns and villages list. And population and the number of households | |||||
| Ranking | Cities, towns and villages name |  | Population | Number of households | |
| Total | Man | Woman | |||
| Nagasaki Prefecture | 1450027 | 680387 | 769640 | 611343 | |
| 1 | Nagasaki | 444757 | 205470 | 239287 | 201108 | 
| 2 | Sasebo | 264959 | 124158 | 140801 | 118812 | 
| 3 | Isahaya | 141788 | 66843 | 74945 | 55583 | 
| 4 | Omura | 91763 | 43931 | 47832 | 38005 | 
| 5 | Nanto Haraichi | 52928 | 24747 | 28181 | 18634 | 
| 6 | Unzen | 49139 | 23321 | 25818 | 16618 | 
| 7 | Shimabara | 48949 | 22797 | 26152 | 18693 | 
| 8 | Nagayo-cho, Nishi-Sonogi-gun | 42656 | 20347 | 22309 | 15991 | 
| 9 | Goto | 42652 | 19935 | 22717 | 20628 | 
| 10 | Hirado | 36584 | 17154 | 19430 | 14410 | 
| 11 | Tsushima | 35724 | 17394 | 18330 | 15462 | 
| 12 | Saikai | 31889 | 15317 | 16572 | 12536 | 
| 13 | Iki | 30589 | 14550 | 16039 | 11632 | 
| 14 | Togitsu-cho, Nishi-Sonogi-gun | 30124 | 14622 | 15502 | 12160 | 
| 15 | Matsuura | 25836 | 12347 | 13489 | 10204 | 
| 16 | Shinkamigoto-cho, Minami-Matsuura-gun | 23271 | 10886 | 12385 | 10651 | 
| 17 | Hasami-cho, Higashi-Sonogi-gun | 15442 | 7266 | 8176 | 4996 | 
| 18 | Kawatana-cho, Higashi-Sonogi-gun | 15073 | 7143 | 7930 | 5429 | 
| 19 | Saza-cho, Kita-Matsuura-gun | 13792 | 6458 | 7334 | 5330 | 
| 20 | Higashisonogi-cho, Higashi-Sonogi-gun | 9151 | 4328 | 4823 | 3114 | 
| 21 | Ojika-cho, Kita-Matsuura-gun | 2961 | 1373 | 1588 | 1347 | 
| Ministry of Internal Affairs and Communications (2009 data) | |||||