Arnold

County:: Allegheny County
County Seat:: No
Area (mi²):: 0.732
State:: Pennsylvania

Arnold is a city located in Allegheny County, Pennsylvania. Arnold has a 2025 population of 4,610. Arnold is currently declining at a rate of -0.71% annually and its population has decreased by -3.44% since the most recent census, which recorded a population of 4,774 in 2020.

The average household income in Arnold is $59,113 with a poverty rate of 25.04%. The median age in Arnold is 39.1 years: 34.2 years for males, and 43.8 years for females.

Demographics

The racial composition of Arnold includes 67.71% White, 24.65% Black or African American, and smaller percentages for Native American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	3,208	67.71%
Black or African American	1,168	24.65%
Two or more races	307	6.48%
Native American	55	1.16%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Arnold Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Arnold's average per capita income is $36,017. Household income levels show a median of $48,119. The poverty rate stands at 25.04%.

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	$75,893	-
Families	$73,013	$80,035
Households	$48,119	$59,113
Non Families	$26,811	$34,122

$36,017

Average Income

$48,119

Median Household Income

25.04%

Poverty Rate