10 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Delta | 1 | 3,773 | 3,643 | 0.59% | 439 | 9 | City |
| Fillmore | 2 | 2,866 | 2,631 | 1.38% | 401 | 7 | City |
| Hinckley | 3 | 655 | 613 | 1.08% | 131 | 5 | Town |
| Oak City | 4 | 643 | 613 | 0.78% | 552 | 1 | Town |
| Kanosh | 5 | 502 | 502 | 0% | 650 | 1 | Town |
| Holden | 6 | 460 | 457 | 0.22% | 785 | 1 | Town |
| Scipio | 7 | 377 | 355 | 1.07% | 364 | 1 | Town |
| Meadow | 8 | 356 | 331 | 1.14% | 695 | 1 | Town |
| Leamington | 9 | 285 | 263 | 1.42% | 182 | 2 | Town |
| Lynndyl | 10 | 127 | 114 | 1.6% | 40 | 3 | Town |
Delta is the largest city in Millard County, with a population of 3,773.
Lynndyl is the smallest city in Millard County, with a population of 127.
There are 10 cities in Millard County, Utah.