Decatur County, Tennessee
Located in Tennessee, Decatur County has a population of 11,579 residents and a median age of 45.8 years, making it the #2,385 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 22.1%. The median home value is $139,600, and the median household income is $45,375, which is 40% below the national median.
Demographics
Decatur County has a population of 11,579, making it the #2,385 most populous county in the US. The median age is 45.8 years, which is 17.7% 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 Decatur County is $45,375, ranking #2,954 out of 3,222 counties — 39.6% below the national median. The poverty rate is 22.1% and unemployment stands at 7.2%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Decatur County is $139,600 (-50.5% vs national). Renters pay a median of $757/mo and the homeownership rate is 74.3%.
Median Home Value Trend
Rankings →Household Type
Education
In Decatur County, 14.0% of adults age 25+ hold a bachelor's degree or higher, which is 58.4% below the national average, ranking #2,929 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Decatur County is 70.7 years. 24.4% of adults report poor or fair health and 11.6% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
25.5% of adults in Decatur County smoke , 41.5% are obese , and 17.0% report excessive drinking. The drug overdose death rate is 37.6 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 19.4 per 100,000. Motor vehicle deaths occur at a rate of 24.6 per 100,000.
Suicide Rate Trend
Families & Children
24.0% of children in Decatur County live in poverty . The teen birth rate is 15.8 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Decatur County is 57.0%. The mean commute time is 29.8 min, which is 8.0% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Decatur County voted Republican with a margin of 69.1%. The vote was 15% Dem / 84.1% Rep. Compared to 2020, the margin shifted 5.6 toward Republicans .
Vote Share Over Time
About Decatur County, Tennessee
Decatur County, Tennessee has a total population of 11,579, making it the 2,385th most populous county in the United States. The median age in Decatur County is 45.8 years, which is 17.7% above the national median of 38.9 years.
The median household income in Decatur County is $45,375, which ranks #2,954 of 3,222 counties nationwide. This is 39.6% below the national median of $75,149. The poverty rate is 22.1%, higher than the national rate of 12.6%. The unemployment rate stands at 7.2%.
The median home value in Decatur County is $139,600, 50.5% below the national median. Renters in Decatur County pay a median gross rent of $757 per month. The homeownership rate is 74.3%, compared to the national rate of 64.4%.
In Decatur County, 14.0% of residents aged 25 and older hold a bachelor's degree or higher, 58.4% below the national average of 33.7%. Health insurance coverage stands at 89.7% of the population. The average commute time for workers is 29.8 min.
Decatur County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 90.1% of the population, followed by Hispanic or Latino (3.7%) and Black (non-Hispanic) (2.7%).
All data for Decatur 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.