Nagano's 2025 population is now estimated at 364,210. In 1950, the population of Nagano was 104,642. Nagano experienced a decrease of -1,488 residents over the past year, marking an annual decline of -0.41%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Nagano, which typically includes Nagano's population in addition to adjacent suburban areas.
| City | 2025 Pop. ↓ | Growth |
|---|---|---|
| Tokyo | 37,036,200 | -0.21% |
| Osaka | 18,921,600 | -0.24% |
| Nagoya | 9,534,790 | -0.23% |
| Fukuoka | 5,465,920 | -0.22% |
| Shizuoka | 2,930,170 | -0.18% |
| Sapporo | 2,653,580 | -0.28% |
| Sendai | 2,337,590 | -0.16% |
| Hiroshima | 2,058,190 | -0.23% |
| Niigata | 793,974 | -0.24% |
| Kumamoto | 735,149 | -0.22% |
| Okayama | 718,616 | -0.24% |
| Kagoshima | 578,881 | -0.4% |
| Utsunomiya | 517,568 | -0.24% |
| Matsuyama | 502,185 | -0.29% |
| Oita | 474,415 | -0.22% |
| Kurashiki | 470,339 | -0.23% |
| Kanazawa | 461,142 | -0.24% |
| Fukuyama | 460,453 | -0.23% |
| Takamatsu | 414,621 | -0.23% |
| Toyama | 405,849 | -0.36% |
