21 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Escanaba | 1 | 12,267 | 12,412 | -0.24% | 962 | 13 | City |
| Gladstone | 2 | 5,219 | 5,252 | -0.13% | 1,030 | 5 | City |
| Wells | 3 | 4,812 | 4,867 | -0.48% | 121 | 40 | Township |
| Escanaba | 4 | 3,546 | 3,509 | 0% | 60 | 60 | Township |
| Ford River | 5 | 2,009 | 2,026 | -0.45% | 31 | 65 | Township |
| Masonville | 6 | 1,621 | 1,641 | -0.49% | 10 | 167 | Township |
| Wells | 7 | 1,588 | 1,588 | 0.06% | 46 | 34 | Township |
| Bark River | 8 | 1,580 | 1,597 | -0.44% | 35 | 46 | Township |
| Rapid River | 9 | 1,307 | 1,246 | 0.93% | 37 | 35 | Township |
| Brampton | 10 | 1,027 | 1,031 | -0.39% | 43 | 24 | Township |
| Garden | 11 | 766 | 774 | -0.52% | 5 | 160 | Township |
| Ensign | 12 | 736 | 745 | -0.54% | 13 | 59 | Township |
| Maple Ridge | 13 | 685 | 692 | -0.58% | 6 | 108 | Township |
| Cornell | 14 | 563 | 566 | -0.35% | 9 | 60 | Township |
| Nahma | 15 | 462 | 468 | -0.43% | 3 | 168 | Township |
| Rapid River | 16 | 381 | 279 | 7.02% | 302 | 1 | CDP |
| Bay de Noc | 17 | 297 | 300 | -0.34% | 4 | 68 | Township |
| Fairbanks | 18 | 295 | 295 | 0% | 6 | 47 | Township |
| Rock | 19 | 230 | 158 | 6.98% | 255 | 1 | CDP |
| Wells | 20 | 219 | 214 | 0.46% | 1 | 154 | Township |
| Garden | 21 | 186 | 189 | -0.53% | 225 | 1 | Village |
Escanaba is the largest city in Delta County, with a population of 12,267.
Garden is the smallest city in Delta County, with a population of 186.
There are 21 cities in Delta County, Michigan.