Platte County, Missouri Demographics 2026

Population Overview

Platte County is located in Missouri with a total population of 108,751. It is the 11th most populous county out of 115 in Missouri.

Age Demographics

The median age in Platte County is 38.7 years. This is about average than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Platte County is $95,748. This is 39% higher than the state median of $68,920. Compared to the national median of $78,538, household income here is 22% higher. The poverty rate stands at 6.9%. This is 46% lower than the state poverty rate of 12.6%. The unemployment rate is 3.5%. This is 14% lower than the state rate of 4.1%. The median home value is $317,600. Housing costs are 47% higher than the state median of $215,600. The home-value-to-income ratio is 3.3x. 67.0% of occupied housing units are owner-occupied. This homeownership rate is 1% lower than the state average of 67.9%.

Race & Ethnicity

The largest racial or ethnic group in Platte County is White (non-Hispanic), making up 77.5% of the population. Black or African American residents account for 7.2%.

Education

45.6% of residents aged 25 and older hold a bachelor's degree or higher. This places Platte County in the top 10% of all cities in the state for educational attainment. This is 43% higher than the state rate of 31.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 96.7%. Notably, 17.4% of adults hold a graduate or professional degree, indicating a highly educated workforce.