Johnson County vs Washington County

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

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

Washington County has the higher population (13,682 vs 13,350 in Johnson County). Washington County has the higher median household income ($75,652 vs $65,203 in Johnson County). Washington County has the higher median home value ($149,800 vs $148,200 in Johnson County).

Population, income & housing

	Johnson County	Washington County
Population	13,350	13,682
Median age	42.7 yrs	44.2 yrs
Median household income	$65,203	$75,652
Median home value	$148,200	$149,800
Median gross rent	$634	$776
Housing units	5,538	6,402
Homeownership rate	84.7%	81.2%
Bachelor's degree or higher	18.8%	24.4%
Unemployment rate	2.4%	4.1%

Trends (ACS 5-year, 2019–2023)

	Johnson County	Washington County
Population	12,494 → 13,350 (+6.9%)	14,058 → 13,682 (-2.7%)
Median household income	$52,774 → $65,203 (+23.6%)	$61,763 → $75,652 (+22.5%)
Median home value	$109,500 → $148,200 (+35.3%)	$113,500 → $149,800 (+32.0%)
Median gross rent	$663 → $634 (-4.4%)	$716 → $776 (+8.4%)

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

Washington County

Population

14,05813,682

Median household income

$61,763$75,652

Median home value

$113,500$149,800

Median gross rent

$716$776

Age & race/ethnicity

Age distribution (share)

	Johnson County	Washington County
Under 5	4.2%	5.0%
5 to 17	13.5%	16.0%
18 to 24	9.6%	7.1%
25 to 34	13.1%	11.0%
35 to 44	12.6%	11.9%
45 to 54	11.7%	12.3%
55 to 64	14.7%	15.5%
65 to 74	11.7%	12.3%
75 and over	8.7%	9.0%

Race & ethnicity (share)

	Johnson County	Washington County
White (non-Hispanic)	81.0%	95.1%
Black or African American	7.5%	0.5%
American Indian & Alaska Native	0.0%	0.1%
Asian	0.2%	0.2%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	7.0%	2.6%
Hispanic or Latino	4.2%	1.6%

Educational attainment (age 25+)

Share of adults 25+

	Johnson County	Washington County
No high school diploma	14.1%	6.8%
High school graduate	32.7%	31.8%
Some college or associate's	34.4%	37.0%
Bachelor's degree	12.2%	16.4%
Graduate or professional degree	6.6%	8.0%

Commute to work

How workers get to work (share)

	Johnson County	Washington County
Drove alone	86.1%	82.6%
Carpooled	6.8%	7.0%
Public transit	0.0%	0.1%
Walked	0.3%	2.4%
Bicycle	0.0%	0.1%
Worked from home	5.5%	6.6%
Other means	1.2%	1.3%

Housing

Units in structure (share)

	Johnson County	Washington County
1-unit, detached	70.3%	86.5%
1-unit, attached	0.3%	0.8%
2 to 4 units	3.3%	2.5%
5 to 19 units	1.9%	1.3%
20 or more units	1.0%	0.3%
Mobile home & other	23.3%	8.6%

Poverty & households

	Johnson County	Washington County
Poverty rate	16.7%	7.8%
Average household size	2.78	2.35
Mean commute (minutes)	27	26
Median year structure built	1985	1970