| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mobile | 1 | 199,605 | 206,485 | -0.61% | 1,323 | 151 | City |
| Prichard | 2 | 18,704 | 19,283 | -0.64% | 739 | 25 | City |
| Saraland | 3 | 16,703 | 16,337 | 0.31% | 484 | 35 | City |
| Satsuma | 4 | 6,878 | 6,768 | 0.39% | 936 | 7 | City |
| Semmes | 5 | 6,521 | 5,206 | 4.19% | 413 | 16 | City |
| Chickasaw | 6 | 6,114 | 6,455 | -0.84% | 1,453 | 4 | City |
| Citronelle | 7 | 3,894 | 3,937 | -0.08% | 150 | 26 | City |
| Bayou La Batre | 8 | 2,053 | 2,152 | -0.73% | 274 | 7 | City |
| Creola | 9 | 1,971 | 1,933 | 0.41% | 126 | 16 | City |
| Dauphin Island | 10 | 1,963 | 1,784 | 1.76% | 314 | 6 | Town |
| Mount Vernon | 11 | 1,390 | 1,355 | 0.36% | 254 | 5 | Town |
Mobile is the largest city in Mobile County, with a population of 199,605.
Mount Vernon is the smallest city in Mobile County, with a population of 1,390.
There are 11 cities in Mobile County, Alabama.