Dubuque County vs Johnson County

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

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

Johnson County has the higher population (154,881 vs 98,948 in Dubuque County). Dubuque County has the higher median household income ($75,919 vs $74,721 in Johnson County). Johnson County has the higher median home value ($293,100 vs $226,100 in Dubuque County).

Population, income & housing

	Dubuque County	Johnson County
Population	98,948	154,881
Median age	38.8 yrs	30.8 yrs
Median household income	$75,919	$74,721
Median home value	$226,100	$293,100
Median gross rent	$944	$1,104
Housing units	43,003	67,211
Homeownership rate	73.2%	58.8%
Bachelor's degree or higher	32.9%	54.6%
Unemployment rate	3.8%	3.7%

Trends (ACS 5-year, 2019–2023)

	Dubuque County	Johnson County
Population	96,982 → 98,948 (+2.0%)	148,577 → 154,881 (+4.2%)
Median household income	$63,031 → $75,919 (+20.4%)	$62,542 → $74,721 (+19.5%)
Median home value	$166,800 → $226,100 (+35.6%)	$227,600 → $293,100 (+28.8%)
Median gross rent	$783 → $944 (+20.6%)	$972 → $1,104 (+13.6%)

Dubuque County

Population

96,98298,948

Median household income

$63,031$75,919

Median home value

$166,800$226,100

Median gross rent

$783$944

Johnson County

Population

148,577154,881

Median household income

$62,542$74,721

Median home value

$227,600$293,100

Median gross rent

$972$1,104

Age & race/ethnicity

Age distribution (share)

	Dubuque County	Johnson County
Under 5	6.0%	5.4%
5 to 17	16.6%	14.1%
18 to 24	10.1%	20.9%
25 to 34	12.2%	14.8%
35 to 44	12.0%	12.4%
45 to 54	10.8%	9.9%
55 to 64	13.4%	9.6%
65 to 74	10.8%	7.9%
75 and over	8.0%	5.0%

Race & ethnicity (share)

	Dubuque County	Johnson County
White (non-Hispanic)	88.9%	75.5%
Black or African American	2.9%	7.5%
American Indian & Alaska Native	0.1%	0.1%
Asian	1.2%	5.8%
Native Hawaiian & Pacific Islander	0.8%	0.0%
Some other race	0.1%	0.4%
Two or more races	3.0%	4.0%
Hispanic or Latino	3.1%	6.7%

Educational attainment (age 25+)

Share of adults 25+

	Dubuque County	Johnson County
No high school diploma	5.9%	3.8%
High school graduate	32.5%	15.8%
Some college or associate's	28.7%	25.9%
Bachelor's degree	21.7%	30.6%
Graduate or professional degree	11.2%	24.0%

Commute to work

How workers get to work (share)

	Dubuque County	Johnson County
Drove alone	78.4%	64.9%
Carpooled	6.2%	7.5%
Public transit	1.0%	4.1%
Walked	2.5%	7.9%
Bicycle	0.2%	1.9%
Worked from home	11.0%	12.6%
Other means	0.7%	1.1%

Housing

Units in structure (share)

	Dubuque County	Johnson County
1-unit, detached	70.8%	48.6%
1-unit, attached	3.7%	11.9%
2 to 4 units	8.7%	6.0%
5 to 19 units	7.5%	17.1%
20 or more units	6.0%	12.7%
Mobile home & other	3.3%	3.7%

Poverty & households

	Dubuque County	Johnson County
Poverty rate	9.4%	16.7%
Average household size	2.34	2.36
Mean commute (minutes)	17	20
Median year structure built	1970	1991