5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Covington | 1 | 15,833 | 14,239 | 1.71% | 1,001 | 16 | City |
| Oxford | 2 | 2,315 | 2,300 | 0.13% | 1,075 | 2 | City |
| Porterdale | 3 | 2,008 | 1,807 | 1.72% | 844 | 2 | City |
| Newborn | 4 | 789 | 677 | 2.47% | 495 | 2 | Town |
| Mansfield | 5 | 515 | 452 | 2.18% | 471 | 1 | City |
Covington is the largest city in Newton County, with a population of 15,833.
Mansfield is the smallest city in Newton County, with a population of 515.
There are 5 cities in Newton County, Georgia.