Includes details of the Mildred Lankerd-Thomas Genealogical Library, genealogical club, cemetery commission, message board, chat room, and guest book.

Maintains a research library, provides free classes on researching family history, and publishes a newsletter. Online document archive includes local maps, cemetary listings, city directories, Civil War draft lists, death notices, newspaper articles, and tax lists.

Based in Hollidaysburg. Includes newsletter, publications, meeting details and membership form.

Based in Ebensburg. Includes newsletter, picture gallery, publications and membership details.

The genealogical society for the Dauphin County/Harrisburg area.

Serve its members and the public via informative meetings, a quarterly newsletter, the maintenance of a file of member surname interests, and the publication of various types of county records.

Features a history center in West Chester that features exhibits, letters, diaries and documents found in library and archives.

Based in Clarion. Includes event calendar, product list, biographies, obituaries and information on the Sutton-Ditz House Museum.

Based in Lock Haven. Provides a history of the society, event and membership details, and a virtual tour of the Heisey Museum.

Historical Society for Beaver, Conneaut, Spring, Summerhill townships as well as Conneautville and Springboro in Crawford County.

Two Mile House and Hamilton Library and Museum. Directions, history of the society, events, photos, genealogical and historical research service, school programs.

Provides a history of Frackville and its schools, as well as a photo archive.

Based in Olyphant. Includes meeting information, membership dues, mission statement and related links.

Philadelphia-based organization that offers resources and gatherings to assist users with genealogy.

The Germantown Historical Society works to preserve and perpetuate the history of, and historical items from, the Germantown section and former Germantown Township of Philadelphia, Pennsylvania.

Official homepage of the Hartslog Society, dedicated to preserving the memory of the Hartslog Church, the first church built in the Juniata Valley.

Based in Indiana. Includes an overview of the society, newsletter and membership details.

Based in Reading. Provides an overview of the society, photo galleries, articles, mailing list and information on the Hendel Mansion.

Searchable database of the society's archives.

Based in Huntingdon. Includes publications, newsletter, obituary search and an overview and history of the society.

Based in Mifflintown. Provides an overview, membership information, publication list, news and event details.

Provides a brief history of Franklin County, profile of the society and information on membership dues.

Provides an overview of the society, exhibit details and online access to their archives.

Based in Lebanon. Includes news, exhibit details and information on the Stoy Museum.

Based in Allentown. Provides an overview of the society, membership details, a history of the county, events calendar and information on their museum.

Based in Williamsport. Includes genealogical resources and related links.

Based in Williamsport. Presents an overview of the society, news, exhibit details, picture gallery and information about their museum.

Includes historical information on the town with details of society properties and events.

Society, historical, factual, and genealogical information about the Pilgrim Fathers.

Based in Mercer. Includes event information, mission statement, relevant forms and related links.

Based in Easton. Provides a society profile, event calendar, membership details and exhibit information.

Devoted to preserving and sharing the history of the Oswayo Valley, located in northwestern Potter County, Pennsylvania.

Located in Bedford. Provides an overview of the society, news, publication list and membership information.

Dedicated to preserving historic landmarks in Allegheny County. Includes news, publication list, registries, event details and membership information.

Archive of historical and geological resources pertaining to the area.

Covers York and Adams Counties. Includes an overview of the society, newsletter, information on its structure and event details.

Genealogical research center and museum. Holdings, township information, One Hundred Years Ago columns, journal table of contents, hours & directions.

Historical Society of the Reformed Church in the United States, the Evangelical Synod of North America, the Evangelical and Reformed Church and the United Church of Christ. The Society is housed on the second floor of the Philip Schaff Library at Lancaster Theological Seminary, Lancaster, Pennsylvania

Among the oldest historical societies in the United States, HSP is one of the premier repositories for books, manuscripts, graphic materials, and family history resources.

Based in Womelsdorf. Provides an overview of the society and contact details.

Based in Lewisburg. Includes a history of the society and county, list of names that the society has genealogical information for and a list of former place names.

Collect historical information and items. Includes information on the collection, publications, hours and location.

Based in Pittsburgh. Includes an overview of the society, calendar, publications and research information.

The museums, historic sites, collections, and archives of the York County Heritage Trust offer a window into the past that provides a view into the future.