Union County's estimated 2025 population is 21,381 with a growth rate of 1.5% in the past year according to the most recent United States census data. Union County is the 66th largest county in Tennessee. The 2010 population was 19,118 and has seen a growth of 11.84% since that time.
Data after 2023 is projected based on recent change
The racial composition of Union County includes 95.23% White, and smaller percentages for Black or African American, other race, Asian and multiracial populations.
White (95.23%)
Two or more races (3.9%)
Black or African American (0.55%)
Other race (0.3%)
Asian (0.02%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 19,180 | 95.23% |
| Two or more races | 785 | 3.9% |
| Black or African American | 111 | 0.55% |
| Other race | 61 | 0.3% |
| Asian | 4 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
Union County's average per capita income is $43,143. Household income levels show a median of $61,858. The poverty rate stands at 13.94%.
Name | Median | Mean |
|---|---|---|
| Married Families | $80,033 | - |
| Families | $71,211 | $82,231 |
| Households | $61,858 | $76,005 |
| Non Families | $27,335 | $49,064 |
Average Income
Median Household Income
Poverty Rate