This completely revised third edition examines the holdings of the major Ohio archives and libraries and the many other resources available for family history research: statewide indexes and personal name finding aids, biographies, local histories, vital and church records, probate and court records, census and military records, land records, newspapers, naturalization records, gravestones, genealogical collections, and many others. In addition, numerous Ohio records have been published by genealogical and historical organizations, and many records and indexes are available on microfilm, compact disc, and especially the Internet.

This new edition includes the following enhancements: new Ohio content on FamilySearch.org; expanded and updated information for the Ohio Genealogical Society; revised information regarding major libraries in Ohio; completely up-to-date website addresses; addresses of all Ohio public libraries; addresses of repositories both in and out of state which hold Ohio-related materials; 21 maps; an expanded bibliography; and an index.