| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Killdeer | 1 | 902 | 935 | -1.1% | 419 | 2 | City |
| Dunn Center | 2 | 235 | 229 | 0% | 601 | 0 | City |
| Halliday | 3 | 228 | 237 | -1.3% | 495 | 0 | City |
| Dodge | 4 | 85 | 87 | -1.16% | 182 | 0 | City |
Killdeer is the largest city in Dunn County, with a population of 902.
Dodge is the smallest city in Dunn County, with a population of 85.
There are 4 cities in Dunn County, North Dakota.