Cass County vs Johnson County

A side-by-side comparison of Cass County and Johnson County: population, income, housing, and more.

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

Johnson County has the higher population (13,350 vs 12,826 in Cass County). Johnson County has the higher median household income ($65,203 vs $64,907 in Cass County). Johnson County has the higher median home value ($148,200 vs $95,500 in Cass County).

Population, income & housing

	Cass County	Johnson County
Population	12,826	13,350
Median age	38.1 yrs	42.7 yrs
Median household income	$64,907	$65,203
Median home value	$95,500	$148,200
Median gross rent	$723	$634
Housing units	5,665	5,538
Homeownership rate	74.9%	84.7%
Bachelor's degree or higher	20.0%	18.8%
Unemployment rate	4.9%	2.4%

Trends (ACS 5-year, 2019–2023)

	Cass County	Johnson County
Population	12,493 → 12,826 (+2.7%)	12,494 → 13,350 (+6.9%)
Median household income	$52,373 → $64,907 (+23.9%)	$52,774 → $65,203 (+23.6%)
Median home value	$80,800 → $95,500 (+18.2%)	$109,500 → $148,200 (+35.3%)
Median gross rent	$598 → $723 (+20.9%)	$663 → $634 (-4.4%)

Cass County

Population

12,49312,826

Median household income

$52,373$64,907

Median home value

$80,800$95,500

Median gross rent

$598$723

Johnson County

Population

12,49413,350

Median household income

$52,774$65,203

Median home value

$109,500$148,200

Median gross rent

$663$634

Age & race/ethnicity

Age distribution (share)

	Cass County	Johnson County
Under 5	6.7%	4.2%
5 to 17	17.8%	13.5%
18 to 24	7.8%	9.6%
25 to 34	13.0%	13.1%
35 to 44	12.6%	12.6%
45 to 54	11.4%	11.7%
55 to 64	12.2%	14.7%
65 to 74	11.7%	11.7%
75 and over	6.8%	8.7%

Race & ethnicity (share)

	Cass County	Johnson County
White (non-Hispanic)	71.2%	81.0%
Black or African American	3.7%	7.5%
American Indian & Alaska Native	0.1%	0.0%
Asian	0.8%	0.2%
Native Hawaiian & Pacific Islander	0.6%	0.0%
Some other race	0.4%	0.0%
Two or more races	1.3%	7.0%
Hispanic or Latino	21.9%	4.2%

Educational attainment (age 25+)

Share of adults 25+

	Cass County	Johnson County
No high school diploma	13.3%	14.1%
High school graduate	42.4%	32.7%
Some college or associate's	24.4%	34.4%
Bachelor's degree	15.0%	12.2%
Graduate or professional degree	4.9%	6.6%

Commute to work

How workers get to work (share)

	Cass County	Johnson County
Drove alone	79.4%	86.1%
Carpooled	12.5%	6.8%
Public transit	0.0%	0.0%
Walked	1.2%	0.3%
Bicycle	0.5%	0.0%
Worked from home	5.8%	5.5%
Other means	0.7%	1.2%

Housing

Units in structure (share)

	Cass County	Johnson County
1-unit, detached	79.5%	70.3%
1-unit, attached	0.1%	0.3%
2 to 4 units	5.2%	3.3%
5 to 19 units	2.1%	1.9%
20 or more units	1.8%	1.0%
Mobile home & other	11.3%	23.3%

Poverty & households

	Cass County	Johnson County
Poverty rate	10.9%	16.7%
Average household size	2.47	2.78
Mean commute (minutes)	22	27
Median year structure built	1967	1985