Adamsburg is a borough in Westmoreland County, Pennsylvania, United States. The population was 172 at the 2010 census. The borough was named for John Quincy Adams, 6th President of the United States.
Adamsburg is located at 40°18′38″N 79°39′16″W (40.310501, -79.654423).
According to the United States Census Bureau, the borough has a total area of 0.3 square miles (0.8 km2), all of it land.
As of the census of 2000, there were 221 people, 84 households, and 63 families residing in the borough. The population density was 838.3 people per square mile (328.2/km²). There were 92 housing units at an average density of 349.0 per square mile (136.6/km²). The racial makeup of the borough was 100.00% White. Hispanic or Latino of any race were 0.90% of the population.
There were 84 households out of which 33.3% had children under the age of 18 living with them, 54.8% were married couples living together, 15.5% had a female householder with no husband present, and 25.0% were non-families. 21.4% of all households were made up of individuals and 7.1% had someone living alone who was 65 years of age or older.