Iwate: Population Decline Ranking
All 33 municipalities in Iwate ranked by Population Decline.
Top municipalities in Iwate by population decline: 1. Nishiwaga (-62.2%), 2. Kuzumaki (-57.6%), 3. Fudai (-57.5%).
| Rank | Municipality | Pop. (2025) | Change 2020–2050 |
|---|---|---|---|
| 1 | Iwate Nishiwaga | 4,355 | ▼ -62.2% |
| 2 | Iwate Kuzumaki | 4,874 | ▼ -57.6% |
| 3 | Iwate Fudai | 2,132 | ▼ -57.5% |
| 4 | Iwate Ichinohe | 10,009 | ▼ -56.9% |
| 5 | Iwate Iwate | 10,652 | ▼ -55.5% |
| 6 | Iwate Hirono | 13,406 | ▼ -54.8% |
| 7 | Iwate Tanohata | 2,678 | ▼ -54.6% |
| 8 | Iwate Yamada | 12,680 | ▼ -53.2% |
| 9 | Iwate Iwaizumi | 7,421 | ▼ -53.0% |
| 10 | Iwate Hachimantai | 22,060 | ▼ -52.8% |
| 11 | Iwate Kunohe | 4,713 | ▼ -52.6% |
| 12 | Iwate Karumai | 7,410 | ▼ -52.4% |
| 13 | Iwate Ootsuchi | 9,850 | ▼ -51.0% |
| 14 | Iwate Sumita | 4,331 | ▼ -50.9% |
| 15 | Iwate Kamaishi | 27,992 | ▼ -49.0% |
| 16 | Iwate Shizukuishi | 14,286 | ▼ -48.4% |
| 17 | Iwate Toono | 22,625 | ▼ -48.0% |
| 18 | Iwate Hiraizumi | 6,422 | ▼ -47.7% |
| 19 | Iwate Rikuzentakata | 16,395 | ▼ -47.3% |
| 20 | Iwate Miyako | 44,247 | ▼ -47.1% |
| 21 | Iwate Noda | 3,609 | ▼ -46.5% |
| 22 | Iwate Ninohe | 22,975 | ▼ -46.3% |
| 23 | Iwate Kuji | 29,622 | ▼ -45.8% |
| 24 | Iwate Ichinoseki | 101,810 | ▼ -45.3% |
| 25 | Iwate Oofunato | 30,565 | ▼ -44.5% |
| 26 | Iwate Oushuu | 103,802 | ▼ -38.6% |
| 27 | Iwate Hanamaki | 87,233 | ▼ -34.8% |
| 28 | Iwate Shiwa | 31,441 | ▼ -26.6% |
| 29 | Iwate Kanegasaki | 15,110 | ▼ -25.9% |
| 30 | Iwate Morioka | 278,444 | ▼ -22.2% |
| 31 | Iwate Takizawa | 53,711 | ▼ -20.8% |
| 32 | Iwate Yahaba | 26,981 | ▼ -20.6% |
| 33 | Iwate Kitakami | 90,811 | ▼ -20.5% |