Jonestown, previously known as Williamsburg, is a borough in Lebanon County, Pennsylvania, United States.

[5] According to the U.S. Census Bureau, the borough has a total area of 0.6 square miles (1.6 km2), all of which is land.

As of the 2000 census,[7] there were 1,028 people, 402 households, and 272 families living in the borough.

There were 418 housing units at an average density of 649.4 per square mile (250.7/km2).

28.4% of all households were made up of individuals, and 7.2% had someone living alone who was 65 years of age or older.