Johnson County, Tennessee
Located in Tennessee, Johnson County has a population of 18,196 residents and a median age of 46.7 years, making it the #1,981 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 21.4%. The median home value is $178,600, and the median household income is $53,129, which is 29% below the national median.
Demographics
Johnson County has a population of 18,196, making it the #1,981 most populous county in the US. The median age is 46.7 years, which is 20.1% 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 Johnson County is $53,129, ranking #2,588 out of 3,222 counties — 29.3% below the national median. The poverty rate is 21.4% and unemployment stands at 3.2%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Johnson County is $178,600 (-36.6% vs national). Renters pay a median of $674/mo and the homeownership rate is 77.5%.
Median Home Value Trend
Rankings →Household Type
Education
In Johnson County, 17.5% of adults age 25+ hold a bachelor's degree or higher, which is 48.0% below the national average, ranking #2,422 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Johnson County is 72.3 years. 23.2% of adults report poor or fair health and 13.3% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
23.4% of adults in Johnson County smoke , 39.1% are obese , and 17.6% report excessive drinking. The drug overdose death rate is 61.0 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 36.7 per 100,000. Motor vehicle deaths occur at a rate of 26.4 per 100,000.
Suicide Rate Trend
Families & Children
28.0% of children in Johnson County live in poverty . The teen birth rate is 30.7 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Johnson County is 53.5%. The mean commute time is 27.9 min, which is 1.2% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Johnson County voted Republican with a margin of 69.3%. The vote was 15% Dem / 84.3% Rep. Compared to 2020, the margin shifted 2.4 toward Republicans .
Vote Share Over Time
About Johnson County, Tennessee
Johnson County, Tennessee has a total population of 18,196, making it the 1,981st most populous county in the United States. The median age in Johnson County is 46.7 years, which is 20.1% above the national median of 38.9 years.
The median household income in Johnson County is $53,129, which ranks #2,588 of 3,222 counties nationwide. This is 29.3% below the national median of $75,149. The poverty rate is 21.4%, higher than the national rate of 12.6%. The unemployment rate stands at 3.2%.
The median home value in Johnson County is $178,600, 36.6% below the national median. Renters in Johnson County pay a median gross rent of $674 per month. The homeownership rate is 77.5%, compared to the national rate of 64.4%.
In Johnson County, 17.5% of residents aged 25 and older hold a bachelor's degree or higher, 48.0% below the national average of 33.7%. Health insurance coverage stands at 86.6% of the population. The average commute time for workers is 27.9 min.
Johnson County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 87.3% of the population, followed by Black (non-Hispanic) (4.7%) and Two or More Races (3.5%).
All data for Johnson 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.