12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Albertville | 1 | 23,635 | 22,402 | 1.04% | 877 | 27 | City |
| Albertville | 2 | 23,635 | 22,420 | 1.04% | 877 | 27 | City |
| Guntersville | 3 | 9,405 | 8,559 | 1.76% | 367 | 26 | City |
| Guntersville | 4 | 9,405 | 8,589 | 1.76% | 367 | 26 | City |
| Arab | 5 | 9,036 | 8,437 | 1.32% | 678 | 13 | City |
| Arab | 6 | 9,036 | 8,444 | 1.32% | 678 | 13 | City |
| Grant | 7 | 1,068 | 1,038 | 0.56% | 577 | 2 | Town |
| Grant | 8 | 1,068 | 1,038 | 0.56% | 577 | 2 | Town |
| Douglas | 9 | 795 | 758 | 0.89% | 233 | 3 | Town |
| Douglas | 10 | 795 | 758 | 0.89% | 233 | 3 | Town |
| Union Grove | 11 | 77 | 72 | 1.32% | 138 | 1 | Town |
| Union Grove | 12 | 77 | 72 | 1.32% | 138 | 1 | Town |
Albertville is the largest city in Marshall County, with a population of 23,635.
Union Grove is the smallest city in Marshall County, with a population of 77.
There are 12 cities in Marshall County, Alabama.