| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Delta | 1 | 3,912 | 3,640 | 1.14% | 455 | 9 | City |
| Fillmore | 2 | 2,929 | 2,630 | 1.91% | 410 | 7 | City |
| Hinckley | 3 | 685 | 614 | 1.63% | 137 | 5 | Town |
| Oak City | 4 | 663 | 613 | 1.38% | 569 | 1 | Town |
| Kanosh | 5 | 513 | 503 | 0.39% | 665 | 1 | Town |
| Holden | 6 | 473 | 457 | 0.64% | 807 | 1 | Town |
| Scipio | 7 | 387 | 357 | 1.31% | 373 | 1 | Town |
| Meadow | 8 | 368 | 331 | 1.66% | 719 | 1 | Town |
| Leamington | 9 | 290 | 262 | 1.75% | 185 | 2 | Town |
| Lynndyl | 10 | 133 | 114 | 2.31% | 42 | 3 | Town |
Delta is the largest city in Millard County, with a population of 3,912.
Lynndyl is the smallest city in Millard County, with a population of 133.
There are 10 cities in Millard County, Utah.