Decatur County's estimated 2026 population is 11,982 with a growth rate of 0.77% in the past year according to the most recent United States census data. Decatur County is the 86th largest county in Tennessee. The 2010 population was 11,713 and has seen a growth of 2.3% since that time.
Data after 2023 is projected based on recent change
The racial composition of Decatur County includes 91.57% White, 3.07% Black or African American, and smaller percentages for Asian, other race, Native American and multiracial populations.
White (91.57%)
Two or more races (3.76%)
Black or African American (3.07%)
Asian (0.94%)
Other race (0.58%)
Native American (0.08%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 10,530 | 91.57% |
| Two or more races | 432 | 3.76% |
| Black or African American | 353 | 3.07% |
| Asian | 108 | 0.94% |
| Other race | 67 | 0.58% |
| Native American | 9 | 0.08% |
Married
Widowed
Divorced
Separated
Never Married
Decatur County's average per capita income is $39,804. Household income levels show a median of $46,190. The poverty rate stands at 21.6%.
Name | Median | Mean |
|---|---|---|
| Married Families | $74,457 | - |
| Families | $62,181 | $73,130 |
| Households | $46,190 | $62,272 |
| Non Families | $26,101 | $37,912 |
Average Income
Median Household Income
Poverty Rate