American Memory
Bureau of Land Management-General Land Office Records
Chronicling America Newspapers
Cyndi’s List
Dick Eastman’s Online Genealogy Newsletter
Digital Public Library of America
Elephind – Historical newspapers
FamilySearch
FamilySearch: Ohio Births and Christenings 1821-1962
FamilySearch: Ohio Catalog Entries
FamilySearch: Ohio Deaths 1908-1953
FamilySearch: Ohio Deaths and Burials 1854-1977
FamilySearch: Ohio Diocese of Toledo 1796-2004
FamilySearch: Ohio Marriages 1800-1958
FamilySearch: Ohio Naturalizations
FamilySearch: Ohio Probate Records
FamilySearch: Ohio Records
FamilySearch: Ohio Tax Records 1816-1838
Federation of Genealogical Societies
Genealogy Guys Learn
Genealogy Squad
Heritage Pursuit – Coming Soon
The Heritage Pursuits site contains thousand of documents. These files contain nearly all county histories from Ohio Counties, Extensive German and other family research records. There are thousands of pictures of individuals and local historic sites. The site should be useful to historians and family history researchers.
Library of Congress
Library of Congress Sanborn Map Collection
Linkpendium
Morgan Library of Ohio Imprints, 1796-1850
National Archives and Records Administration
National Genealogical Society