| Zip Code | City | Population ↓ |
|---|---|---|
| 37166 | Smithville | 14,051 |
| 37012 | Alexandria | 2,340 |
| 37095 | Liberty | 2,279 |
| 37059 | Dowelltown | 1,588 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in DeKalb County, Tennessee (US Census).