Jefferson County, IA — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
15,676
Male
8,071
51.5%
Female
7,605
48.5%
Median Age
43.5 yrs
Avg Household Size
2.1
Foreign Born
11.8%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher31.2%
High School or Higher49.0%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
6.6%
Disability
0.0%
Non-English Home
3.5%
Married
41.1%
Jefferson County, IA has a population of 15,676 according to 2023 Census Bureau estimates. The median age is 43.5 years. The largest racial or ethnic group is White at 84.7% of the population. 31.2% of residents hold a bachelor's degree or higher. 11.8% of residents are foreign-born.