Extinct Pennsylvania Counties:: (not linked unless noted, ): (If you know of more to be added, please contact us.)
County Name
Ontario -
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Factual information
1810-1812 renamed Bradford Co. 
More information here soon
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Genealogical/Historical Commissions, Societies and Museums: Please click on graphic below, " " (if present) for the entire GHLL county "package"
(To list a local society, please contact us.)
County Name
A ——
Adams -
Allegheny -
Allegheny -
Allegheny -
Allegheny -
Armstrong -
B ——
Bedford -
Berks -
Blair -
Blair -
Bradford -
Bucks -
Butler -
C ——
Cambria -
Cameron -
Chester -
Chester -
Clarion -
Clearfield -
Clinton -
Clinton -
Columbia -
Crawford -
Cumberland -
D ——
Dauphin -
Dauphin -
Delaware -
E ——
Erie -
F ——
Fayette -
Fayette -
Franklin -
G ——
Greene -
Greene -
H ——
Hermitage -
Huntingdon -
I ——
Indiana -
J ——
Jefferson -
Juniata -
L ——
Lackawanna -
Lancaster -
Lebanon -
Lehigh -
Lehigh -
Luzerne -
Lycoming -
M ——
McKean -
Mercer -
Mercer -
Mifflin -
Mifflin -
Monroe -
Montgomery -
Montour -
N ——
Northampton -
Northumberland-
P ——
Perry -
Philadelphia -
S ——
Schuylkill -
Snyder -
Somerset -
Sullivan -
Susquehanna -
T ——
Tioga -
U ——
Union -
V ——
Venango -
Venango -
W ——
Warren -
Washington -
Wayne -
Westmoreland -
Westmoreland -
Wyoming -
Y ——
York -
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Society Name and Location
Adams County Historical Society (Gettysburg, PA) 
Allegheny County Genealogical Society (Pittsburgh, PA) 
Allegheny-Kiski Valley Historical Society (Tarentum, PA) 
Ingram Historical Society (Ingram, PA) 
Multiple County Genealogical / Historical Societies (multiple listings, PA) 
Armstrong County Genealogical Society (Kittanning, PA) 
Bedford County Historical Society (Bedford, PA) 
Historical Society of Berks County (Reading, PA) 
Blair County Genealogical Society (Hollidaysburg, PA) 
Blair County Historical Society (Altoona, PA) 
Bradford County Historical Society (Towanda, PA) 
Bucks County Historical Society & Museums (Doylestown, PA) 
Butler County Historical Society (Butler, PA) 
Cambria County Historical Society (Ebensburg, PA) 
Cameron County Historical Society & Museum (Emporium, PA) 
Chester County Historical Society (Facebook)(West Chester, PA) 
Chester County Historical Society (Twitter) (West Chester, PA) 
Clarion County Historical Society (Facebook) (Clarion, PA) 
Clearfield County Historical Society & Museum (Clearfield, PA) 
Clinton Genealogical Society (Lock Haven, PA 
Clinton Historical Society (Lock Haven, PA) 
Columbia County Historical & Genealogical Society (Bloomsburg, PA) 
Crawford County Genealogical Society (Meadville, PA) 
Cumberland County Historical Society (Clarlisle, PA) 
Historical Society of Dauphin County (Harrisburg, PA) 
Pennsylvania Historical and Museum Commission (Harrisburg, PA) 
Delaware County Societies, multiple listings (multiple townships, PA) 
Erie County Historical Society (Erie, PA) 
Fayette County Genealogical Society of Pennsylvania (Uniontown, PA) 
Fayette County Historical Society (Uniontown, PA) 
Franklin County Historical Society-Kittochtinny (Chambersburg, PA) 
Cornerstone Genealogical Society (Waynesburg, PA) 
Greene County Historical Society (Waynesburg, PA) 
Hermitage Historical Society (Hermitage, PA)
Huntingdon County Historical Society (Huntingdon, PA) 
Historical and Genealogical Society of Indiana County (Indiana, PA) 
Jefferson County History Center (Brookville, PA) 
Juniata County Historical Society (Mifflintown, PA) 
Lackawanna Historical Society (Scranton, PA) 
Lancaster County Historical Society (Lancaster, PA) 
Lebanon County Historical Society (Lebanon, PA) 
Lehigh County Historical Society (Allentown, PA) 
Museum of Indian Culture [Lenape (Delaware)] (Allentown, PA) 
Luzerne County Historical Society (Wilkes-Barre, PA) 
Lycoming County Historical Society & Museum (Williamsport, PA) 
McKean County Historical Society (Smethport, PA) 
Mercer County Historical Society (Mercer, PA) 
Hermitage Historical Society (Hermitage, PA) 
Mifflin County Historical Society (Lewistown, PA) 
Mifflin County Mennonite Historical Society (Belleville, PA) 
Monroe County Historical Association (Stroudsburg, PA) 
Historical Society of Montgomery County (Norristown, PA) 
Montour County Genealogical Society (Danville, PA) 
Northampton County Hist. & Genealogical Soc. (Easton, PA) 
Northumberland County Historical Soc. (Sunbury, PA) 
Perry County Historical Society (Newport, PA) 
Jewish Genealogy Society of Greater Philadelphia (Philadelphia, PA) 
Historical Society of Schuylkill County (Pottsville, PA) 
Snyder County Historical Society (Middleburg, PA) 
Somerset Historical Center (Somerset, PA) 
Sullivan County Historical Society (Laporte, PA) 
Susquehanna County Historical Society (Montrose, PA) 
Tioga County Historical society (Wellsboro, PA) 
Union County Historical Society (Lewisburg, PA) 
Venango County Genealogical Club (Oil City, PA) 
Venango County Historical Society (Franklin, PA) 
Warren County Historical Society (Warren, PA) 
Washington County Historical Society (Washington, PA) 
Wayne County Historical Society (Honesdale, PA) 
Baltzer Meyer Historical Society (Greensburg, PA) 
Westmoreland County Historical Society (Greensburg, PA) 
Wyoming County Historical Society (Tunkhannock, WY) 
York County Historical Society & Heritage Trust (York, PA) 
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— Serving multiple areas —
Lithuanian Global Genealogical Society (Schuylkill Haven, PA) Note: The registered address is in Pennsylvania, but also serves areas in Connecticut.
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