10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Covington | 1 | 15,567 | 14,196 | 1.73% | 985 | 16 | City |
| Covington | 2 | 15,567 | 14,239 | 1.73% | 985 | 16 | City |
| Oxford | 3 | 2,312 | 2,297 | 0.09% | 1,074 | 2 | City |
| Oxford | 4 | 2,312 | 2,300 | 0.09% | 1,074 | 2 | City |
| Porterdale | 5 | 1,974 | 1,809 | 1.7% | 830 | 2 | City |
| Porterdale | 6 | 1,974 | 1,807 | 1.7% | 830 | 2 | City |
| Newborn | 7 | 770 | 675 | 2.39% | 483 | 2 | Town |
| Newborn | 8 | 770 | 677 | 2.39% | 483 | 2 | Town |
| Mansfield | 9 | 504 | 450 | 2.02% | 461 | 1 | City |
| Mansfield | 10 | 504 | 452 | 2.02% | 461 | 1 | City |
Covington is the largest city in Newton County, with a population of 15,567.
Mansfield is the smallest city in Newton County, with a population of 504.
There are 10 cities in Newton County, Georgia.