5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Covington | 1 | 14,967 | 14,242 | 0.98% | 947 | 16 | City |
| Oxford | 2 | 2,288 | 2,303 | -0.13% | 1,063 | 2 | City |
| Porterdale | 3 | 1,938 | 1,802 | 1.41% | 815 | 2 | City |
| Newborn | 4 | 765 | 680 | 2.27% | 480 | 2 | Town |
| Mansfield | 5 | 487 | 442 | 1.88% | 446 | 1 | City |
Covington is the largest city in Newton County, with a population of 14,967.
Mansfield is the smallest city in Newton County, with a population of 487.
There are 5 cities in Newton County, Georgia.