Penn township

County:: Johnson County
County Seat:: No
Area (mi²):: 21.036
State:: Iowa

Penn township is located in Johnson County, Iowa. Penn township has a 2025 population of 32,113. Penn township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The average household income in Penn township is $142,288 with a poverty rate of 4.1%. The median age in Penn township is 34.2 years: 31 years for males, and 36 years for females.

Demographics

The racial composition of Penn township includes 77.65% White, 7.47% Asian, 6.2% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Asian

Black or African American

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	24,937	77.65%
Two or more races	2,455	7.64%
Asian	2,400	7.47%
Black or African American	1,991	6.2%
Other race	283	0.88%
Native American	36	0.11%
Native Hawaiian or Pacific Islander	11	0.03%

Penn township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Penn township's average per capita income is $62,136. Household income levels show a median of $112,035. The poverty rate stands at 4.1%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$146,999	-
Families	$135,488	$165,762
Households	$112,035	$142,288
Non Families	$69,375	$84,121

$62,136

Average Income

$112,035

Median Household Income

4.1%

Poverty Rate