Union County, Tennessee
Located in Tennessee, Union County has a population of 20,431 residents and a median age of 42.7 years, making it the #1,857 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 13.8%. The median home value is $204,000, and the median household income is $62,727, which is 17% below the national median.
Demographics
Union County has a population of 20,431, making it the #1,857 most populous county in the US. The median age is 42.7 years, which is 9.8% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Union County is $62,727, ranking #1,828 out of 3,222 counties — 16.5% below the national median. The poverty rate is 13.8% and unemployment stands at 2.6%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Union County is $204,000 (-27.6% vs national). Renters pay a median of $847/mo and the homeownership rate is 80.2%.
Median Home Value Trend
Rankings →Household Type
Education
In Union County, 14.2% of adults age 25+ hold a bachelor's degree or higher, which is 57.9% below the national average, ranking #2,914 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Union County is 69.8 years. 22.1% of adults report poor or fair health and 12.8% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
22.9% of adults in Union County smoke , 37.7% are obese , and 18.4% report excessive drinking. The drug overdose death rate is 89.0 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Union County is 8.2 per 100,000 and the suicide rate is 20.9 per 100,000. Motor vehicle deaths occur at a rate of 20.9 per 100,000.
Suicide Rate Trend
Families & Children
23.4% of children in Union County live in poverty . The teen birth rate is 36.9 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Union County is 52.9%. The mean commute time is 38.8 min, which is 40.5% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Union County voted Republican with a margin of 71.2%. The vote was 14% Dem / 85.2% Rep. Compared to 2020, the margin shifted 2.9 toward Republicans .
Vote Share Over Time
About Union County, Tennessee
Union County, Tennessee has a total population of 20,431, making it the 1,857th most populous county in the United States. The median age in Union County is 42.7 years, which is 9.8% above the national median of 38.9 years.
The median household income in Union County is $62,727, which ranks #1,828 of 3,222 counties nationwide. This is 16.5% below the national median of $75,149. The poverty rate is 13.8%, higher than the national rate of 12.6%. The unemployment rate stands at 2.6%.
The median home value in Union County is $204,000, 27.6% below the national median. Renters in Union County pay a median gross rent of $847 per month. The homeownership rate is 80.2%, compared to the national rate of 64.4%.
In Union County, 14.2% of residents aged 25 and older hold a bachelor's degree or higher, 57.9% below the national average of 33.7%. Health insurance coverage stands at 91.9% of the population. The average commute time for workers is 38.8 min.
Union County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 94.0% of the population, followed by Two or More Races (3.1%) and Hispanic or Latino (2.4%).
All data for Union County, Tennessee comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.