| County : | Dekalb County |
| State : | Tennessee (TN) |
| Land Area : | 304.34 sq mi |
| Water Area : | 24.64 sq mi |
| Latitude : | 35.9822204 |
| Longitude : | -85.8335963 |
| Population (2010): | 18,723 |
| Population Estimate (2012) : | 18,770 |
| Population Density : | 61.52/sq mi |
| Housing Units (2012) : | 9,405 |
| Median Household Income (2012) : | $36,713 (Tennessee : $44,140, USA : $53,046) |
| Median Family Income (2012) : | $45,073 (Tennessee : $54,737, USA : $64,585) |
| Median House Price (2012) : | $105,400 (Tennessee : $138,700, USA : $181,400) |
Dekalb County Cities / Towns
| Alexandria Town (966) | Dowelltown Town (355) | Liberty Town (310) |
| Smithville City (4,530) |
Dekalb County Zip Codes
| 37012 (2,292) | 37059 (1,552) | 37095 (1,854) |
| 37166 (13,446) | 38544 (6,543) | 38567 (784) |
| 38569 (363) | 38581 (4,112) | 38582 (1,426) |
| 38583 (23,825) |