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Jefferson County Chapter, OGS
County chapter of the Ohio Genealogical Society. Provides membership details, officer directory, event calendar, and vital records.
Jefferson County Historical Association and Museum
Provides overview of museum collections, history, hours of operation, and contact details.
Jefferson County OHGenExchange
Genealogical data exchange where visitors and researchers alike can go to find specific persons, and exchange specific data with one another.
Jefferson County, Ohio, USGenWeb
An internet source devoted entirely to genealogical research.