Warren County, Missouri Demographics 2026

Population Overview

Warren County is located in Missouri with a total population of 36,467. It is the 32nd most populous county out of 115 in Missouri. The county encompasses 6 Census-designated places.

Age Demographics

The median age in Warren County is 40.8 years. This is 5% higher than the state median of 38.9 years.

Economy, Income & Housing

The median household income in Warren County is $77,989. This is 13% higher than the state median of $68,920. It is also about the same as the national median of $78,538. The poverty rate stands at 9.3%. This is 26% lower than the state poverty rate of 12.6%. The unemployment rate is 3.8%. This is 8% lower than the state rate of 4.1%. The median home value is $241,200. Housing costs are 12% higher than the state median of $215,600. The home-value-to-income ratio is 3.1x. 82.4% of occupied housing units are owner-occupied. This homeownership rate is 21% higher than the state average of 67.9%.

Race & Ethnicity

Warren County has a predominantly White (non-Hispanic) population, comprising 89.8% of all residents. Hispanic or Latino residents account for 4.0%. The Black or African American population (2.1%) is well below the state average of 11.0%. The Asian population (0.5%) is well below the state average of 2.1%.

Education

19.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 39% lower 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 89.2%.

Data Sources & Methodology

All figures for Warren County come from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023), with comparisons drawn against Missouri and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.