The Pennsylvania Federation of Historical Societies was founded in 1905 as an umbrella organization for local historical and genealogical societies in Pennsylvania. Its founding members included:
Pennsylvania Historical Society
Pennsylvania German Society
Hamilton Library Association of Carlisle
Lebanon County Historical Society
Berks County Historical Society
York County Historical Society
Lancaster County Historical Society
Schuylkill County Historical Society
Montgomery County Historical Society
Kittochtinny Historical Society
American Catholic Historical Society
Historical Society of Frankford
Fayette County Historical Society
State Library of Pennsylvania
Later members included:
City History Society of Philadelphia
Northampton County Historical and Genealogical Society
Site and Relic Society of Germantown
Church Historical Society, Philadelphia
Society of Pennsylvania Women in New York
Friends Historical Society of Philadelphia
Society of the Descendants of the Schwenkfeldian Exiles
Lehigh County Historical Society
Tioga County Historical Society
McKean County Historical Society
Presbyterian Historical Society, Philadelphia
Bucks County Historical Society
Pennsylvania Society of New York
Wyoming Historical and Geological Society
