Northumberland County Map

Northumberland County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 91,647. Its county seat is Sunbury. The county is part of the Central Pennsylvania region of the state.
  • Country: United States
  • State: Pennsylvania
  • Founded: March 21, 1772
  • Named for: Northumberland, England
  • Seat: Sunbury
  • Largest city: Sunbury
  • Congressional district: 9th

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Data from: en.wikipedia.org