Derry township

County:: Westmoreland County
County Seat:: No
Area (mi²):: 27.133
State:: Pennsylvania

Derry township is located in Westmoreland County, Pennsylvania. Derry township has a 2025 population of 24,832. Derry township is currently declining at a rate of -0.23% annually but its population has increased by 0.42% since the most recent census, which recorded a population of 24,729 in 2020.

The average household income in Derry township is $139,679 with a poverty rate of 8.92%. The median age in Derry township is 41.9 years: 39.3 years for males, and 44.1 years for females.

Demographics

The racial composition of Derry township includes 76.97% White, 10.02% Asian, 5.63% other race, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Other race

Two or more races

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	19,132	76.97%
Asian	2,492	10.02%
Other race	1,399	5.63%
Two or more races	1,162	4.67%
Black or African American	654	2.63%
Native American	19	0.08%
Native Hawaiian or Pacific Islander	0	0%

Derry township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Derry township's average per capita income is $57,009. Household income levels show a median of $93,564. The poverty rate stands at 8.92%.

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	$155,825	-
Families	$134,567	$178,060
Households	$93,564	$139,679
Non Families	$61,856	$76,368

$57,009

Average Income

$93,564

Median Household Income

8.92%

Poverty Rate