Northumberland County
Formed March 21, 1772 from Lancaster, Cumberland, Berks, Bedford and Northampton counties. Some 27 counties today occupy its once vast area. Sunbury, the county seat, was laid out 1772. Site of Fort Augusta, a key post built 1756-57.
Digital Commonwealth, Boston Public LibraryDigital Commonwealth, Boston Public LibraryDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford Libraries
Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov
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