Derry township

County:: Westmoreland County
County Seat:: No
Area (mi²):: 30.735
State:: Pennsylvania

Derry township is located in Westmoreland County, Pennsylvania. Derry township has a 2025 population of 7,189. Derry township is currently declining at a rate of -0.29% annually and its population has decreased by -0.39% since the most recent census, which recorded a population of 7,217 in 2020.

The average household income in Derry township is $77,991 with a poverty rate of 5.46%. The median age in Derry township is 52.9 years: 51.9 years for males, and 53 years for females.

Demographics

The racial composition of Derry township includes 96.83% White, and smaller percentages for Two or more races, other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	7,006	96.83%
Two or more races	188	2.6%
Other race	29	0.4%
Asian	8	0.11%
Black or African American	4	0.06%
Native American	0	0%
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 $40,710. Household income levels show a median of $65,480. The poverty rate stands at 5.46%.

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	$77,029	-
Families	$72,013	$89,181
Households	$65,480	$77,991
Non Families	$38,529	$42,121

$40,710

Average Income

$65,480

Median Household Income

5.46%

Poverty Rate