Thornburg

County:: Allegheny County
County Seat:: No
Area (mi²):: 0.438
State:: Pennsylvania

Thornburg is a borough located in Allegheny County, Pennsylvania. Thornburg has a 2025 population of 441. Thornburg is currently declining at a rate of -1.12% annually and its population has decreased by -5.77% since the most recent census, which recorded a population of 468 in 2020.

The average household income in Thornburg is $275,528 with a poverty rate of 0.68%. The median age in Thornburg is 42.9 years: 42.6 years for males, and 43.8 years for females.

Demographics

The racial composition of Thornburg includes 89.64% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Black or African American

Asian

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	398	89.64%
Two or more races	36	8.11%
Other race	4	0.9%
Black or African American	3	0.68%
Asian	3	0.68%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Thornburg Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Thornburg's average per capita income is $113,750. Household income levels show a median of $220,625. The poverty rate stands at 0.68%.

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
Families	$229,375	$285,029
Married Families	$228,125	-
Households	$220,625	$275,528
Non Families	$137,500	$205,328

$113,750

Average Income

$220,625

Median Household Income

0.68%

Poverty Rate