Platte County, Missouri
Located in Missouri, Platte County has a population of 110,371 residents and a median age of 39.1 years, making it the #571 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 7.0%. The median home value is $345,100, and the median household income is $96,227, which is 28% above the national median.
Demographics
Platte County has a population of 110,371, making it the #571 most populous county in the US. The median age is 39.1 years, which is 0.5% 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 Platte County is $96,227, ranking #207 out of 3,222 counties — 28.0% above the national median. The poverty rate is 7.0% and unemployment stands at 2.7%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Platte County is $345,100 (+22.4% vs national). Renters pay a median of $1,334/mo and the homeownership rate is 67.4%.
Median Home Value Trend
Rankings →Household Type
Education
In Platte County, 46.5% of adults age 25+ hold a bachelor's degree or higher, which is 38.0% above the national average, ranking #141 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Platte County is 79.1 years. 14.8% of adults report poor or fair health and 7.4% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
14.9% of adults in Platte County smoke , 39.5% are obese , and 22.7% report excessive drinking. The drug overdose death rate is 19.0 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Platte County is 4.0 per 100,000 and the suicide rate is 13.8 per 100,000. Motor vehicle deaths occur at a rate of 8.7 per 100,000.
Homicide Rate Trend
Families & Children
6.3% of children in Platte County live in poverty and the infant mortality rate is 5.5 per 1,000 live births. The teen birth rate is 8.2 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Platte County is 74.9%. The mean commute time is 26.2 min, which is 5.2% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Platte County voted Republican with a margin of 3.1%. The vote was 47.7% Dem / 50.8% Rep. Compared to 2020, the margin shifted 0.1 toward Republicans .
Vote Share Over Time
About Platte County, Missouri
Platte County, Missouri has a total population of 110,371, making it the 571st most populous county in the United States. The median age in Platte County is 39.1 years, which is 0.5% above the national median of 38.9 years.
The median household income in Platte County is $96,227, which ranks #207 of 3,222 counties nationwide. This is 28.0% above the national median of $75,149. The poverty rate is 7.0%, lower than the national rate of 12.6%. The unemployment rate stands at 2.7%.
The median home value in Platte County is $345,100, 22.4% above the national median. Renters in Platte County pay a median gross rent of $1,334 per month. The homeownership rate is 67.4%, compared to the national rate of 64.4%.
In Platte County, 46.5% of residents aged 25 and older hold a bachelor's degree or higher, 38.0% above the national average of 33.7%. Health insurance coverage stands at 93.9% of the population. The average commute time for workers is 26.2 min.
Platte County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 76.7% of the population, followed by Black (non-Hispanic) (7.5%) and Hispanic or Latino (7.2%).
All data for Platte 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.