Allison vs Shell Rock

A side-by-side comparison of Allison and Shell Rock: population, income, housing, and more.

Allison and Shell Rock are places in Iowa. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Shell Rock has the higher population (1,634 vs 1,028 in Allison). Shell Rock has the higher median household income ($70,556 vs $64,306 in Allison). Shell Rock has the higher median home value ($159,100 vs $104,600 in Allison).

Population, income & housing

	Allison	Shell Rock
Population	1,028	1,634
Median age	44.1 yrs	36.8 yrs
Median household income	$64,306	$70,556
Median home value	$104,600	$159,100
Median gross rent	$619	$750
Housing units	519	666
Homeownership rate	72.2%	82.5%
Bachelor's degree or higher	17.7%	17.8%
Unemployment rate	0.5%	4.7%

Trends (ACS 5-year, 2019–2023)

	Allison	Shell Rock
Population	1,109 → 1,028 (-7.3%)	1,445 → 1,634 (+13.1%)
Median household income	$53,788 → $64,306 (+19.6%)	$57,750 → $70,556 (+22.2%)
Median home value	$89,600 → $104,600 (+16.7%)	$118,900 → $159,100 (+33.8%)
Median gross rent	$516 → $619 (+20.0%)	$548 → $750 (+36.9%)

Allison

Population

1,1091,028

Median household income

$53,788$64,306

Median home value

$89,600$104,600

Median gross rent

$516$619

Shell Rock

Population

1,4451,634

Median household income

$57,750$70,556

Median home value

$118,900$159,100

Median gross rent

$548$750

Age & race/ethnicity

Age distribution (share)

	Allison	Shell Rock
Under 5	3.2%	8.6%
5 to 17	15.7%	19.8%
18 to 24	5.9%	7.4%
25 to 34	12.1%	12.2%
35 to 44	14.6%	14.0%
45 to 54	15.1%	10.5%
55 to 64	10.8%	10.5%
65 to 74	10.7%	10.0%
75 and over	12.0%	7.0%

Race & ethnicity (share)

	Allison	Shell Rock
White (non-Hispanic)	98.4%	94.6%
Black or African American	0.2%	0.6%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.6%	0.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	0.8%	0.7%
Hispanic or Latino	0.0%	4.1%

Educational attainment (age 25+)

Share of adults 25+

	Allison	Shell Rock
No high school diploma	8.2%	10.3%
High school graduate	40.0%	33.0%
Some college or associate's	34.2%	39.0%
Bachelor's degree	13.1%	12.4%
Graduate or professional degree	4.7%	5.4%

Commute to work

How workers get to work (share)

	Allison	Shell Rock
Drove alone	84.7%	90.3%
Carpooled	4.0%	4.7%
Public transit	0.0%	0.0%
Walked	5.4%	0.9%
Bicycle	0.7%	0.0%
Worked from home	2.2%	4.0%
Other means	3.1%	0.1%

Housing

Units in structure (share)

	Allison	Shell Rock
1-unit, detached	88.4%	87.7%
1-unit, attached	0.4%	0.0%
2 to 4 units	10.2%	6.5%
5 to 19 units	1.0%	4.1%
20 or more units	0.0%	1.8%
Mobile home & other	0.0%	0.0%

Poverty & households

	Allison	Shell Rock
Poverty rate	9.5%	6.0%
Average household size	2.14	2.62
Mean commute (minutes)	25	24
Median year structure built	1956	1955