US Census Data

Grundy County vs Union County

A side-by-side comparison of Grundy County and Union County: population, income, housing, and more.

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

Grundy County has the higher population (12,352 vs 12,038 in Union County). Grundy County has the higher median household income ($83,617 vs $56,813 in Union County). Grundy County has the higher median home value ($180,500 vs $117,800 in Union County).

Population, income & housing

Grundy CountyUnion County
Population12,35212,038
Median age41.5 yrs40.6 yrs
Median household income$83,617$56,813
Median home value$180,500$117,800
Median gross rent$777$683
Housing units5,4895,790
Homeownership rate84.0%72.1%
Bachelor's degree or higher24.7%24.1%
Unemployment rate2.2%4.6%

Trends (ACS 5-year, 2019–2023)

Grundy CountyUnion County
Population12,299 → 12,352 (+0.4%)12,358 → 12,038 (-2.6%)
Median household income$68,038 → $83,617 (+22.9%)$49,900 → $56,813 (+13.9%)
Median home value$130,200 → $180,500 (+38.6%)$104,000 → $117,800 (+13.3%)
Median gross rent$633 → $777 (+22.7%)$609 → $683 (+12.2%)

Grundy County

Population
12,29912,352
Median household income
$68,038$83,617
Median home value
$130,200$180,500
Median gross rent
$633$777

Union County

Population
12,35812,038
Median household income
$49,900$56,813
Median home value
$104,000$117,800
Median gross rent
$609$683

Age & race/ethnicity

Age distribution (share)

Grundy CountyUnion County
Under 55.7%5.1%
5 to 1717.9%18.7%
18 to 246.8%8.7%
25 to 3410.9%10.5%
35 to 4412.4%12.1%
45 to 5411.6%11.0%
55 to 6413.8%13.4%
65 to 7411.4%11.5%
75 and over9.4%9.0%

Race & ethnicity (share)

Grundy CountyUnion County
White (non-Hispanic)95.6%92.6%
Black or African American0.7%0.5%
American Indian & Alaska Native0.3%0.0%
Asian0.5%0.0%
Native Hawaiian & Pacific Islander0.0%0.0%
Some other race0.6%0.2%
Two or more races0.9%3.3%
Hispanic or Latino1.5%3.5%

Educational attainment (age 25+)

Share of adults 25+

Grundy CountyUnion County
No high school diploma2.8%7.0%
High school graduate34.6%34.0%
Some college or associate's37.9%34.9%
Bachelor's degree18.4%17.3%
Graduate or professional degree6.3%6.8%

Commute to work

How workers get to work (share)

Grundy CountyUnion County
Drove alone83.2%78.7%
Carpooled4.5%11.3%
Public transit0.2%0.0%
Walked1.8%5.7%
Bicycle0.2%0.1%
Worked from home9.9%3.7%
Other means0.3%0.6%

Housing

Units in structure (share)

Grundy CountyUnion County
1-unit, detached84.4%76.2%
1-unit, attached1.4%1.8%
2 to 4 units5.8%7.8%
5 to 19 units3.5%4.7%
20 or more units1.6%4.2%
Mobile home & other3.4%5.2%

Poverty & households

Grundy CountyUnion County
Poverty rate6.4%12.6%
Average household size2.402.32
Mean commute (minutes)2215
Median year structure built19601961

Full profiles

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