Johnson County's estimated 2026 population is 18,914 with a growth rate of 1.05% in the past year according to the most recent United States census data. Johnson County is the 70th largest county in Tennessee. The 2010 population was 18,287 and has seen a growth of 3.43% since that time.
Data after 2023 is projected based on recent change
Overall: 46.7 years
Female: 50.8 years
Male: 44.6 years
There are 15,163 adults, (4,273 of whom are seniors) in Johnson County.
Female: 8,456 (46.5%)
Male: 9,740 (53.5%)
The racial composition of Johnson County includes 87.9% White, 4.75% Black or African American, and smaller percentages for other race, Native American, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 15,995 | 87.9% |
| Two or more races | 988 | 5.43% |
| Black or African American | 864 | 4.75% |
| Other race | 181 | 0.99% |
| Native American | 115 | 0.63% |
| Asian | 53 | 0.29% |
Johnson County's average per capita income is $36,940. Household income levels show a median of $53,129. The poverty rate stands at 21.44%.
Name | Median | Mean |
|---|---|---|
| Married Families | $79,336 | - |
| Families | $68,099 | $76,752 |
| Households | $53,129 | $69,507 |
| Non Families | $31,944 | $49,882 |
Average Income
Median Household Income
Poverty Rate