11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Columbia | 1 | 108,346 | 105,412 | 0.54% | 3,393 | 32 | CDP |
| Ellicott City | 2 | 75,528 | 73,272 | 0.86% | 2,517 | 30 | CDP |
| North Laurel | 3 | 29,399 | 24,856 | 5.99% | 4,535 | 6 | CDP |
| Elkridge | 4 | 27,665 | 21,778 | 2.99% | 3,309 | 8 | CDP |
| Scaggsville | 5 | 13,491 | 9,948 | 7.14% | 2,679 | 5 | CDP |
| Jessup | 6 | 10,218 | 10,458 | 2.05% | 1,689 | 6 | CDP |
| Savage | 7 | 7,646 | 6,849 | 0.51% | 2,795 | 3 | CDP |
| Fulton | 8 | 6,282 | 4,050 | 4.72% | 1,659 | 4 | CDP |
| Ashton-Sandy Spring | 9 | 5,565 | 6,239 | -0.09% | 543 | 10 | CDP |
| Highland | 10 | 900 | 1,086 | -0.99% | 374 | 2 | CDP |
| Lisbon | 11 | 78 | 19 | 8.33% | 53 | 1 | CDP |
Columbia is the largest city in Howard County, with a population of 108,346.
Lisbon is the smallest city in Howard County, with a population of 78.
There are 11 cities in Howard County, Maryland.