History in Greene

Founded in 1796, Greene County was established when Washington County was split as an act of Legislature. That brings over two centuries of history and mystery from the southwestern corner of Pennsylvania. Travel around the County with me as we explore a few historical sites.

Mason Dixon Historical Park

World-Famous Boundary Line

When it comes to taking its place in American history, Greene County is unparalleled. And it’s because of a parallel of latitude that Pennsylvania’s southwestern-most county stands above all others. The famous Mason-Dixon Line, run from 1763-67 by British astronomers and surveyors Charles Mason and Jeremiah Dixon, ends its journey at the edge of Greene County.