O'Brien County, IA — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
14,103
Male
7,035
49.9%
Female
7,068
50.1%
Median Age
39.8 yrs
Avg Household Size
2.4
Foreign Born
4.2%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher15.4%
High School or Higher39.7%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
4.5%
Disability
0.0%
Non-English Home
6.6%
Married
46.6%
O'Brien County, IA has a population of 14,103 according to 2023 Census Bureau estimates. The median age is 39.8 years. The largest racial or ethnic group is White at 89.9% of the population. 15.4% of residents hold a bachelor's degree or higher. 4.2% of residents are foreign-born.