Northumberland County, Pennsylvania

Northumberland County is a county in the U.S. state of Pennsylvania. As of the 2020 census, the population was 91,647. Its county seat is Sunbury. The county was created on March 21, 1772 from parts of Lancaster, Berks, Bedford, Cumberland, and Northampton counties and is named after the English county of Northumberland.

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Category:1772 establishments in the Thirteen Colonies
Category:1770s establishments in Pennsylvania
Category:Pennsylvania counties