Derry

County:: Westmoreland County
County Seat:: No
Area (mi²):: 0.772
State:: Pennsylvania

Derry is a borough located in Westmoreland County, Pennsylvania. Derry has a 2025 population of 2,552. Derry is currently declining at a rate of -0.66% annually and its population has decreased by -3.22% since the most recent census, which recorded a population of 2,637 in 2020.

The average household income in Derry is $65,591 with a poverty rate of 16.71%. The median age in Derry is 42.1 years: 37.4 years for males, and 46.7 years for females.

Demographics

The racial composition of Derry includes 95.45% White, and smaller percentages for Black or African American, Two or more races, other race, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Other race

Native American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	2,497	95.45%
Black or African American	74	2.83%
Two or more races	33	1.26%
Other race	12	0.46%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

Derry Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Derry's average per capita income is $46,223. Household income levels show a median of $49,051. The poverty rate stands at 16.71%.

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	$91,680	-
Families	$71,136	$80,605
Households	$49,051	$65,591
Non Families	$33,933	$47,173

$46,223

Average Income

$49,051

Median Household Income

16.71%

Poverty Rate