15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Eldersburg | 1 | 30,314 | 30,550 | -0.05% | 761 | 40 | CDP |
| Westminster | 2 | 20,795 | 20,137 | 0.64% | 3,128 | 7 | City |
| Westminster | 3 | 20,795 | 20,130 | 0.64% | 3,128 | 7 | City |
| Taneytown | 4 | 8,549 | 7,235 | 3.09% | 2,544 | 3 | City |
| Taneytown | 5 | 8,549 | 7,266 | 3.09% | 2,544 | 3 | City |
| Hampstead | 6 | 6,299 | 6,236 | 0.17% | 1,884 | 3 | Town |
| Hampstead | 7 | 6,299 | 6,242 | 0.17% | 1,884 | 3 | Town |
| Manchester | 8 | 5,449 | 5,407 | 0.17% | 2,282 | 2 | Town |
| Manchester | 9 | 5,449 | 5,404 | 0.17% | 2,282 | 2 | Town |
| Sykesville | 10 | 4,696 | 4,308 | 1.6% | 2,939 | 2 | Town |
| Sykesville | 11 | 4,696 | 4,326 | 1.6% | 2,939 | 2 | Town |
| New Windsor | 12 | 1,834 | 1,442 | 4.32% | 2,485 | 1 | Town |
| New Windsor | 13 | 1,834 | 1,452 | 4.32% | 2,485 | 1 | Town |
| Union Bridge | 14 | 947 | 940 | 0.11% | 834 | 1 | Town |
| Union Bridge | 15 | 947 | 939 | 0.11% | 834 | 1 | Town |
Eldersburg is the largest city in Carroll County, with a population of 30,314.
Union Bridge is the smallest city in Carroll County, with a population of 947.
There are 15 cities in Carroll County, Maryland.