Northumberland County on the map of Pennsylvania 2024. Cities, roads, borders and directions in Northumberland County of Pennsylvania.

Northumberland County is located in the central part of Pennsylvania. The county is named after the English county of Northumberland. The county seat of Northumberland County is Sunbury. The overall area of the county is about 477 square miles. Set up back in 1772, today Northumberland County counts over 91 thousand inhabitants. This map shows the borders of Northumberland County as well as neighboring counties, including major highways and natural objecsts as of 2024. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Northumberland County.