Harrison County vs Mills County

A side-by-side comparison of Harrison County and Mills County: population, income, housing, and more.

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

Harrison County has the higher population (14,645 vs 14,563 in Mills County). Mills County has the higher median household income ($87,810 vs $77,027 in Harrison County). Mills County has the higher median home value ($228,700 vs $165,300 in Harrison County).

Population, income & housing

	Harrison County	Mills County
Population	14,645	14,563
Median age	41.9 yrs	42.6 yrs
Median household income	$77,027	$87,810
Median home value	$165,300	$228,700
Median gross rent	$854	$888
Housing units	6,679	6,119
Homeownership rate	76.9%	84.2%
Bachelor's degree or higher	21.2%	32.0%
Unemployment rate	2.8%	2.8%

Trends (ACS 5-year, 2019–2023)

	Harrison County	Mills County
Population	14,089 → 14,645 (+3.9%)	15,034 → 14,563 (-3.1%)
Median household income	$63,854 → $77,027 (+20.6%)	$72,079 → $87,810 (+21.8%)
Median home value	$120,600 → $165,300 (+37.1%)	$168,900 → $228,700 (+35.4%)
Median gross rent	$715 → $854 (+19.4%)	$826 → $888 (+7.5%)

Harrison County

Population

14,08914,645

Median household income

$63,854$77,027

Median home value

$120,600$165,300

Median gross rent

$715$854

Mills County

Population

15,03414,563

Median household income

$72,079$87,810

Median home value

$168,900$228,700

Median gross rent

$826$888

Age & race/ethnicity

Age distribution (share)

	Harrison County	Mills County
Under 5	5.7%	4.8%
5 to 17	17.3%	18.3%
18 to 24	7.3%	6.8%
25 to 34	10.6%	11.3%
35 to 44	11.7%	12.0%
45 to 54	12.3%	12.6%
55 to 64	15.4%	14.4%
65 to 74	11.3%	12.3%
75 and over	8.4%	7.6%

Race & ethnicity (share)

	Harrison County	Mills County
White (non-Hispanic)	95.0%	93.3%
Black or African American	0.1%	0.4%
American Indian & Alaska Native	0.1%	0.1%
Asian	0.3%	0.4%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.1%
Two or more races	2.5%	2.1%
Hispanic or Latino	2.1%	3.6%

Educational attainment (age 25+)

Share of adults 25+

	Harrison County	Mills County
No high school diploma	6.5%	4.4%
High school graduate	38.9%	27.4%
Some college or associate's	33.4%	36.2%
Bachelor's degree	15.6%	22.3%
Graduate or professional degree	5.6%	9.8%

Commute to work

How workers get to work (share)

	Harrison County	Mills County
Drove alone	81.4%	76.9%
Carpooled	5.7%	8.4%
Public transit	0.4%	0.0%
Walked	3.0%	5.0%
Bicycle	0.1%	0.1%
Worked from home	8.6%	9.5%
Other means	0.8%	0.2%

Housing

Units in structure (share)

	Harrison County	Mills County
1-unit, detached	85.2%	84.3%
1-unit, attached	1.1%	1.8%
2 to 4 units	5.2%	7.2%
5 to 19 units	1.8%	1.9%
20 or more units	1.8%	1.4%
Mobile home & other	4.9%	3.4%

Poverty & households

	Harrison County	Mills County
Poverty rate	7.5%	6.9%
Average household size	2.39	2.64
Mean commute (minutes)	26	25
Median year structure built	1952	1973