6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rincon | 1 | 11,870 | 10,942 | 1.44% | 1,218 | 10 | City |
| Rincon | 2 | 11,870 | 11,022 | 1.44% | 1,218 | 10 | City |
| Springfield | 3 | 3,352 | 2,707 | 4% | 957 | 4 | City |
| Springfield | 4 | 3,352 | 2,705 | 4% | 957 | 4 | City |
| Guyton | 5 | 3,234 | 2,320 | 5.72% | 946 | 3 | City |
| Guyton | 6 | 3,234 | 2,356 | 5.72% | 946 | 3 | City |
Rincon is the largest city in Effingham County, with a population of 11,870.
Guyton is the smallest city in Effingham County, with a population of 3,234.
There are 6 cities in Effingham County, Georgia.