Derry township

County:: Westmoreland County
County Seat:: No
Area (mi²):: 95.571
State:: Pennsylvania

Derry township is located in Westmoreland County, Pennsylvania. Derry township has a 2025 population of 13,314. Derry township is currently declining at a rate of -0.4% annually and its population has decreased by -2.11% since the most recent census, which recorded a population of 13,601 in 2020.

The average household income in Derry township is $80,188 with a poverty rate of 12.28%.The median age in Derry township is 47.4 years: 44.9 years for males, and 49.8 years for females.

Demographics

The racial composition of Derry township includes 97.28% White, and smaller percentages for Two or more races, Black or African American, other race, Asian, Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	13,180	97.28%
Two or more races	198	1.46%
Black or African American	98	0.72%
Other race	38	0.28%
Asian	29	0.21%
Native American	6	0.04%

Derry township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Derry township's average per capita income is $50,781. Household income levels show a median of $67,539. The poverty rate stands at 12.28%.

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	$90,047	-
Families	$78,977	$88,632
Households	$67,539	$80,188
Non Families	$40,875	$58,015

$50,781

Average Income

$67,539

Median Household Income

12.28%

Poverty Rate