8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Eldon | 1 | 4,720 | 4,424 | 1.27% | 1,328 | 4 | City |
| Iberia | 2 | 734 | 704 | 0.82% | 833 | 1 | City |
| St. Elizabeth | 3 | 433 | 417 | 0.7% | 416 | 1 | Village |
| Aurora Springs | 4 | 248 | 155 | 7.36% | 577 | 0 | CDP |
| Tuscumbia | 5 | 193 | 187 | 0.52% | 559 | 0 | Town |
| Olean | 6 | 120 | 115 | 0.84% | 694 | 0 | Town |
| Brumley | 7 | 73 | 70 | 1.39% | 132 | 1 | Town |
| Bagnell | 8 | 44 | 43 | 0% | 94 | 0 | Town |
Eldon is the largest city in Miller County, with a population of 4,720.
Bagnell is the smallest city in Miller County, with a population of 44.
There are 8 cities in Miller County, Missouri.