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 and multiracial populations.

Population by Race

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%

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