Jefferson County is situated in the western section of Pennsylvania. The county is named after Thomas Jefferson, third U.S. President. The area of Jefferson County is about 657 square miles. The county was set up in 1804 and it is populated today by 44 thousand residents. Brookville is the county seat of Jefferson County. This map shows the borders of Jefferson County as well as neighboring counties, including major highways and natural objecsts as of 2025. 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 Jefferson County.
The borders of Jefferson County over the map of Pennsylvania
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