Stoneboro is a borough in eastern Mercer County, Pennsylvania, United States.

At the 2000 census there were 1,104 people, 475 households, and 314 families residing in the borough.

There were 517 housing units at an average density of 185.1 per square mile (71.5/km2).

[7] There were 475 households, 31.6% had children under the age of 18 living with them, 55.6% were married couples living together, 8.0% had a female householder with no husband present, and 33.7% were non-families.

30.5% of households were made up of individuals, and 21.1% were one person aged 65 or older.