10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Delta | 1 | 3,751 | 3,643 | 0.56% | 436 | 9 | City |
| Fillmore | 2 | 2,827 | 2,631 | 1.4% | 396 | 7 | City |
| Hinckley | 3 | 648 | 613 | 1.09% | 129 | 5 | Town |
| Oak City | 4 | 638 | 613 | 0.79% | 548 | 1 | Town |
| Kanosh | 5 | 502 | 502 | 0% | 650 | 1 | Town |
| Holden | 6 | 459 | 457 | 0% | 783 | 1 | Town |
| Scipio | 7 | 373 | 355 | 0.81% | 360 | 1 | Town |
| Meadow | 8 | 352 | 331 | 1.15% | 688 | 1 | Town |
| Leamington | 9 | 281 | 263 | 1.08% | 180 | 2 | Town |
| Lynndyl | 10 | 125 | 114 | 1.63% | 39 | 3 | Town |
Delta is the largest city in Millard County, with a population of 3,751.
Lynndyl is the smallest city in Millard County, with a population of 125.
There are 10 cities in Millard County, Utah.