Mercer County, Missouri Demographics 2026

Population Overview

Mercer County is located in Missouri with a total population of 3,501. It is the 114th most populous county out of 115 in Missouri.

Age Demographics

The median age in Mercer 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 Mercer County is $60,357. This is 12% lower than the state median of $68,920. Compared to the national median of $78,538, household income here is 23% lower. The poverty rate stands at 14.7%. This is 17% higher than the state poverty rate of 12.6%. The unemployment rate is 2.4%. This is 43% lower than the state rate of 4.1%. The median home value is $95,300. Housing costs are 56% lower than the state median of $215,600. With a home-value-to-income ratio of just 1.6x, Mercer County is one of the most affordable housing markets in the area. 79.1% of occupied housing units are owner-occupied. This homeownership rate is 16% higher than the state average of 67.9%.

Race & Ethnicity

Mercer County has a predominantly White (non-Hispanic) population, comprising 91.5% of all residents. Hispanic or Latino residents account for 4.4%. The Black or African American population (0.3%) is well below the state average of 11.0%.

Education

17.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 44% 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 90.6%.