DeKalb County's 2026 population is estimated at 22,567, reflecting a 1.85% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). DeKalb County is the 65th largest county in Tennessee. The 2010 population was 18,694 and has grown 20.72% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.9 years
Female: 44.1 years
Male: 39.4 years
There are 16,402 adults, (3,933 of whom are seniors) in DeKalb County.
Female: 10,493 (50.1%)
Male: 10,466 (49.9%)
The racial composition of DeKalb County includes 88.04% White, 4.41% other race, and smaller percentages for Black or African American, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 18,453 | 88.04% |
| Two or more races | 968 | 4.62% |
| Other race | 924 | 4.41% |
| Black or African American | 325 | 1.55% |
| Asian | 231 | 1.1% |
| Native American | 58 | 0.28% |
DeKalb County 's average per capita income is $41,931. Household income levels show a median of $53,153. The poverty rate stands at 18.57%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $81,896 | - |
| Families | $66,800 | $84,023 |
| Households | $53,153 | $71,610 |
| Non Families | $27,095 | $42,768 |
Average Income
Median Household Income
Poverty Rate