Mercer County, Missouri
Located in Missouri, Mercer County has a population of 3,482 residents and a median age of 42.4 years, making it the #3,001 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 13.5%. The median home value is $104,900, and the median household income is $62,679, which is 17% below the national median.
Demographics
Mercer County has a population of 3,482, making it the #3,001 most populous county in the US. The median age is 42.4 years, which is 9.0% 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 Mercer County is $62,679, ranking #1,829 out of 3,222 counties — 16.6% below the national median. The poverty rate is 13.5% and unemployment stands at 3.5%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Mercer County is $104,900 (-62.8% vs national). Renters pay a median of $590/mo and the homeownership rate is 81.0%.
Median Home Value Trend
Rankings →Household Type
Education
In Mercer County, 18.1% of adults age 25+ hold a bachelor's degree or higher, which is 46.2% below the national average, ranking #2,337 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Mercer County is 75.8 years. 20.0% of adults report poor or fair health and 14.8% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
19.8% of adults in Mercer County smoke , 42.4% are obese , and 20.3% report excessive drinking.
Adult Smoking Trend
Safety
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Families & Children
19.0% of children in Mercer 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 Mercer County is 65.7%. The mean commute time is 25.7 min, which is 6.9% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Mercer County voted Republican with a margin of 73.1%. The vote was 13.1% Dem / 86.2% Rep. Compared to 2020, the margin shifted +1.0 toward Democrats .
Vote Share Over Time
About Mercer County, Missouri
Mercer County, Missouri has a total population of 3,482, making it the 3,001st most populous county in the United States. The median age in Mercer County is 42.4 years, which is 9.0% above the national median of 38.9 years.
The median household income in Mercer County is $62,679, which ranks #1,829 of 3,222 counties nationwide. This is 16.6% below the national median of $75,149. The poverty rate is 13.5%, higher than the national rate of 12.6%. The unemployment rate stands at 3.5%.
The median home value in Mercer County is $104,900, 62.8% below the national median. Renters in Mercer County pay a median gross rent of $590 per month. The homeownership rate is 81.0%, compared to the national rate of 64.4%.
In Mercer County, 18.1% of residents aged 25 and older hold a bachelor's degree or higher, 46.2% below the national average of 33.7%. Health insurance coverage stands at 90.8% of the population. The average commute time for workers is 25.7 min.
Mercer County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 91.1% of the population, followed by Hispanic or Latino (4.8%) and Two or More Races (2.6%).
All data for Mercer 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.