Marion County, MO — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
28,493
Male
13,853
48.6%
Female
14,640
51.4%
Median Age
39.4 yrs
Avg Household Size
2.4
Foreign Born
0.7%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher17.4%
High School or Higher43.9%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
6.0%
Disability
0.0%
Non-English Home
6.5%
Married
40.6%
Marion County, MO has a population of 28,493 according to 2023 Census Bureau estimates. The median age is 39.4 years. The largest racial or ethnic group is White at 89.6% of the population. 17.4% of residents hold a bachelor's degree or higher. 0.7% of residents are foreign-born.