US Census Data

Jefferson County vs Marion County

A side-by-side comparison of Jefferson County and Marion County: population, income, housing, and more.

Jefferson County and Marion County are counties in Illinois. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Marion County has the higher population (37,294 vs 36,808 in Jefferson County). Jefferson County has the higher median household income ($61,102 vs $60,839 in Marion County). Jefferson County has the higher median home value ($118,400 vs $100,100 in Marion County).

Population, income & housing

Jefferson CountyMarion County
Population36,80837,294
Median age41.1 yrs41.3 yrs
Median household income$61,102$60,839
Median home value$118,400$100,100
Median gross rent$862$771
Housing units16,65017,379
Homeownership rate71.9%74.5%
Bachelor's degree or higher18.4%17.3%
Unemployment rate6.6%6.4%

Trends (ACS 5-year, 2019–2023)

Jefferson CountyMarion County
Population37,985 → 36,808 (-3.1%)37,743 → 37,294 (-1.2%)
Median household income$49,896 → $61,102 (+22.5%)$47,519 → $60,839 (+28.0%)
Median home value$96,700 → $118,400 (+22.4%)$77,900 → $100,100 (+28.5%)
Median gross rent$701 → $862 (+23.0%)$646 → $771 (+19.3%)

Jefferson County

Population
37,98536,808
Median household income
$49,896$61,102
Median home value
$96,700$118,400
Median gross rent
$701$862

Marion County

Population
37,74337,294
Median household income
$47,519$60,839
Median home value
$77,900$100,100
Median gross rent
$646$771

Age & race/ethnicity

Age distribution (share)

Jefferson CountyMarion County
Under 55.8%6.4%
5 to 1716.6%17.2%
18 to 247.3%7.1%
25 to 3412.1%11.9%
35 to 4412.5%12.0%
45 to 5412.4%11.6%
55 to 6413.5%14.0%
65 to 7411.6%11.7%
75 and over8.1%8.1%

Race & ethnicity (share)

Jefferson CountyMarion County
White (non-Hispanic)84.3%89.6%
Black or African American6.2%4.2%
American Indian & Alaska Native0.2%0.0%
Asian0.9%0.7%
Native Hawaiian & Pacific Islander0.0%0.0%
Some other race0.2%0.6%
Two or more races5.5%2.8%
Hispanic or Latino2.7%2.1%

Educational attainment (age 25+)

Share of adults 25+

Jefferson CountyMarion County
No high school diploma8.6%9.7%
High school graduate32.7%36.1%
Some college or associate's40.3%36.9%
Bachelor's degree11.6%11.8%
Graduate or professional degree6.8%5.5%

Commute to work

How workers get to work (share)

Jefferson CountyMarion County
Drove alone82.3%82.7%
Carpooled10.3%9.7%
Public transit0.3%0.2%
Walked1.1%1.5%
Bicycle0.0%0.3%
Worked from home4.8%5.1%
Other means1.3%0.6%

Housing

Units in structure (share)

Jefferson CountyMarion County
1-unit, detached69.7%70.8%
1-unit, attached0.6%0.5%
2 to 4 units4.4%5.2%
5 to 19 units5.5%4.1%
20 or more units2.5%1.9%
Mobile home & other17.3%17.4%

Poverty & households

Jefferson CountyMarion County
Poverty rate14.2%16.2%
Average household size2.382.36
Mean commute (minutes)2020
Median year structure built19771973

Full profiles

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Jefferson County vs Marion County: Compare Population & Demographics | US Census Data