Prefecture
The population development of Yamaguchi Prefecture according to census results.
| Name | Abbr. | Status | Native | Capital | Area A-L (km²) | Population Census (Cf) 1995-10-01 | Population Census (Cf) 2000-10-01 | Population Census (Cf) 2005-10-01 | Population Census (Cf) 2010-10-01 | Population Census (Cf) 2015-10-01 | Population Census (Cf) 2020-10-01 | Population Census (Cp) 2025-10-01 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yamaguchi | 35 | Pref | 山口県 | Yamaguchi | 6,113 | 1,555,543 | 1,527,964 | 1,492,606 | 1,451,338 | 1,404,729 | 1,342,059 | 1,264,006 | 611300 | → |
| Japan | JPN | 日本国 | Tōkyō | 377,980 | 125,570,246 | 126,925,843 | 127,767,994 | 128,057,352 | 127,094,745 | 126,146,099 | 123,049,524 | → |
- Statistics Bureau Japan.
Major Cities
| Name | Population Census (Cp) 2025-10-01 | |
|---|---|---|
| 1 | Shimonoseki | 237,892 |
| 2 | Yamaguchi | 190,438 |
| 3 | Ube | 152,811 |
| 4 | Shūnan | 131,201 |
| 5 | Iwakuni | 119,618 |
| 6 | Hōfu | 109,723 |
| 7 | San'yō-Onoda | 56,571 |
| 8 | Kudamatsu | 55,052 |
Contents: Cities & Towns
The population of all cities and towns of Yamaguchi Prefecture with more than 20,000 inhabitants according to census results.
| Name | Status | Native | Population Census (Cf) 1995-10-01 | Population Census (Cf) 2000-10-01 | Population Census (Cf) 2005-10-01 | Population Census (Cf) 2010-10-01 | Population Census (Cf) 2015-10-01 | Population Census (Cf) 2020-10-01 | Population Census (Cp) 2025-10-01 | Area | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Hagi | City | 萩市 | 65,293 | 61,745 | 57,990 | 53,747 | 49,560 | 44,626 | 39,786 | 69850 | → |
| Hikari | City | 光市 | 55,408 | 54,680 | 53,971 | 53,004 | 51,369 | 49,798 | 46,329 | 9213 | → |
| Hōfu | City | 防府市 | 118,803 | 117,724 | 116,818 | 116,611 | 115,942 | 113,979 | 109,723 | 18934 | → |
| Iwakuni | City | 岩国市 | 156,347 | 153,985 | 149,702 | 143,857 | 136,757 | 129,125 | 119,618 | 87367 | → |
| Kudamatsu | City | 下松市 | 53,471 | 53,101 | 53,509 | 55,012 | 55,812 | 55,887 | 55,052 | 8934 | → |
| Mine | City | 美祢市 | 32,396 | 31,546 | 29,839 | 28,630 | 26,159 | 23,247 | 20,145 | 47264 | → |
| Nagato | City | 長門市 | 45,565 | 43,473 | 41,127 | 38,349 | 35,439 | 32,519 | 28,832 | 35711 | → |
| San'yō-Onoda | City | 山陽小野田市 | 68,745 | 67,429 | 66,261 | 64,550 | 62,671 | 60,326 | 56,571 | 13309 | → |
| Shimonoseki | City | 下関市 | 310,717 | 301,097 | 290,693 | 280,947 | 268,517 | 255,051 | 237,892 | 71626 | → |
| Shūnan (Tokuyama) | City | 周南市 | 161,562 | 157,383 | 152,387 | 149,487 | 144,842 | 137,540 | 131,201 | 65629 | → |
| Suō-Ōshima | Town | 周防大島町 | 24,795 | 23,013 | 21,392 | 19,084 | 17,199 | 14,798 | 12,854 | 13811 | → |
| Ube | City | 宇部市 | 182,771 | 182,031 | 178,955 | 173,772 | 169,429 | 162,570 | 152,811 | 28705 | → |
| Yamaguchi | City | 山口市 | 193,172 | 197,115 | 199,297 | 196,628 | 197,422 | 193,966 | 190,438 | 102318 | → |
| Yanai | City | 柳井市 | 38,963 | 37,251 | 35,927 | 34,730 | 32,945 | 30,799 | 28,533 | 14003 | → |
- Statistics Bureau Japan.
Population Structure
Further information about the population structure.
| Gender (C 2025) | |
|---|---|
| Males | 601,651 |
| Females | 662,355 |
| Age Groups (C 2020) | |
|---|---|
| 0-17 years | 189,499 |
| 18-64 years | 674,101 |
| 65+ years | 459,957 |
| Age Distribution (C 2020) | |
|---|---|
| 90+ years | 34,831 |
| 80-89 years | 119,921 |
| 70-79 years | 205,100 |
| 60-69 years | 184,421 |
| 50-59 years | 159,327 |
| 40-49 years | 176,000 |
| 30-39 years | 126,778 |
| 20-29 years | 105,019 |
| 10-19 years | 115,133 |
| 0-9 years | 97,027 |
| Citizenship (C 2020) | |
|---|---|
| Japan | 1,313,593 |
| Foreign Citizenship | 14,378 |