Thornburg is a borough located in Allegheny County, in the state of Pennsylvania (PA), United States. Nestled in the Middle Atlantic division of the North-east region, it covers an area of 0.4 square miles (1.0 km²) and sits at an elevation of 850 ft. With a population of approximately 468 residents, Thornburg offers a peaceful, rural atmosphere.
The town's population is composed of about 48.72% males and 51.28% females, and it has a population density of 63.64 people per square mile (410.67/km²). Thornburg lies at a latitude of 40.43 and a longitude of -80.08, operating in the UTC-5.
Locals reflect a blend of American ancestry, with roots primarily in United States (3.4%), followed by English (12.6%), German (20.5%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code N/A.