Knox County, Missouri
Located in Missouri, Knox County has a population of 3,756 residents and a median age of 40.1 years, making it the #2,979 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.9%. The median home value is $101,400, and the median household income is $57,788, which is 23% below the national median.
Demographics
Knox County has a population of 3,756, making it the #2,979 most populous county in the US. The median age is 40.1 years, which is 3.1% 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 Knox County is $57,788, ranking #2,277 out of 3,222 counties — 23.1% below the national median. The poverty rate is 11.9% and unemployment stands at 1.1%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Knox County is $101,400 (-64.0% vs national). Renters pay a median of $666/mo and the homeownership rate is 85.1%.
Median Home Value Trend
Rankings →Household Type
Education
In Knox County, 15.8% of adults age 25+ hold a bachelor's degree or higher, which is 53.1% below the national average, ranking #2,697 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Knox County is 75.7 years. 24.6% of adults report poor or fair health and 16.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
26.9% of adults in Knox County smoke , 38.9% are obese , and 19.6% report excessive drinking.
Adult Smoking Trend
Safety
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Families & Children
26.1% of children in Knox County live in poverty . The teen birth rate is 15.9 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Knox County is 62.1%. The mean commute time is 21.5 min, which is 22.1% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Knox County voted Republican with a margin of 64.5%. The vote was 17.2% Dem / 81.7% Rep. Compared to 2020, the margin shifted 2.6 toward Republicans .
Vote Share Over Time
About Knox County, Missouri
Knox County, Missouri has a total population of 3,756, making it the 2,979th most populous county in the United States. The median age in Knox County is 40.1 years, which is 3.1% above the national median of 38.9 years.
The median household income in Knox County is $57,788, which ranks #2,277 of 3,222 counties nationwide. This is 23.1% below the national median of $75,149. The poverty rate is 11.9%, lower than the national rate of 12.6%. The unemployment rate stands at 1.1%.
The median home value in Knox County is $101,400, 64.0% below the national median. Renters in Knox County pay a median gross rent of $666 per month. The homeownership rate is 85.1%, compared to the national rate of 64.4%.
In Knox County, 15.8% of residents aged 25 and older hold a bachelor's degree or higher, 53.1% below the national average of 33.7%. Health insurance coverage stands at 74.5% of the population. The average commute time for workers is 21.5 min.
Knox County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 94.8% of the population, followed by Native Hawaiian/Pacific Islander (2.0%) and Two or More Races (1.8%).
All data for Knox County, Missouri 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.