Miller County, Missouri Demographics 2026

Population Overview

Miller County is located in Missouri with a total population of 25,081. It is the 42nd most populous county out of 115 in Missouri. The county encompasses 8 Census-designated places.

Age Demographics

The median age in Miller 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 Miller County is $55,172. This is 20% lower than the state median of $68,920. It is also 30% lower than the national median of $78,538. The poverty rate stands at 14.6%. This is 16% higher than the state poverty rate of 12.6%. The unemployment rate is 5.1%. This is 25% higher than the state rate of 4.1%. The median home value is $169,800. Housing costs are 21% lower than the state median of $215,600. The home-value-to-income ratio is 3.1x. 76.1% of occupied housing units are owner-occupied. This homeownership rate is 12% higher than the state average of 67.9%.

Race & Ethnicity

Miller County has a predominantly White (non-Hispanic) population, comprising 93.7% of all residents. Hispanic or Latino residents account for 2.1%. The Black or African American population (1.2%) is well below the state average of 11.0%. The Hispanic or Latino population (2.1%) is well below the state average of 5.1%. The Asian population (0.4%) is well below the state average of 2.1%.

Education

21.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 34% 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 89.5%.

Data Sources & Methodology

All figures for Miller 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.