| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Covington | 1 | 17,741 | 14,232 | 1.51% | 1,122 | 16 | City |
| Oxford | 2 | 2,295 | 2,292 | 0.17% | 1,066 | 2 | City |
| Porterdale | 3 | 1,946 | 1,810 | 1.73% | 818 | 2 | City |
| Newborn | 4 | 759 | 673 | 2.29% | 476 | 2 | Town |
| Mansfield | 5 | 503 | 452 | 2.24% | 460 | 1 | City |
Covington is the largest city in Newton County, with a population of 17,741.
Mansfield is the smallest city in Newton County, with a population of 503.
There are 5 cities in Newton County, Georgia.