Mercer County
Formed March 12, 1800 from Allegheny County. The U.S. census reported 3228 residents in 1800. Named for General Hugh Mercer, Revolutionary hero killed at Battle of Princeton, 1777. Early iron and coal center. Mercer, the county seat, was incorporated 1814.
David Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesBarry Lawrence Ruderman Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDigital Commonwealth, Boston Public Library
Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov
See your own family's places through time.
Start with your family tree