Northumberland, Administrative division in Pennsylvania, United States.
Northumberland is an administrative division in Pennsylvania that spans rolling highlands and mountains cut through by river valleys and waterways. The terrain shifts between forested ridges and flatter areas along the river bottoms, with Sunbury serving as the main urban center.
The territory was created in 1772 by separating parts from several existing counties and was named after an English county across the Atlantic. This formation reflected the growing British settlement and administrative organization in North America.
The area reflects a mix of influences from different peoples who lived here over centuries, visible in place names and how communities gather today. This layered past shapes how people connect with their surroundings and celebrate local traditions.
Sunbury at the center provides main public services and administrative facilities for both visitors and people living across the entire region. The location along river routes makes the area easy to reach, and the varied landscapes invite different kinds of activities.
An English scientist who discovered an important gas settled along the riverbanks in the late 1700s and left behind a historic residence. His arrival made the area a destination for scholars and those interested in scientific work from across Europe.
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