Marion County, IA — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
33,551
Male
16,854
50.2%
Female
16,697
49.8%
Median Age
39.7 yrs
Avg Household Size
2.4
Foreign Born
2.0%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher22.0%
High School or Higher43.8%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
5.4%
Disability
0.0%
Non-English Home
3.6%
Married
48.3%
Marion County, IA has a population of 33,551 according to 2023 Census Bureau estimates. The median age is 39.7 years. The largest racial or ethnic group is White at 94.8% of the population. 22.0% of residents hold a bachelor's degree or higher. 2.0% of residents are foreign-born.