County Genealogy: Part of the INGenWeb project. Biographies, queries, records, other resources.
Ohio County Biographies: Part of the Indiana Biographies project. Index, submission form.
Ohio County Indiana Historical Society & Museum: Features displays of local artifacts housed in a nineteenth century plow factory. Includes details of exhibits and publications for sale. Located in Rising Sun.
The Political Graveyard: Information on the political history, cemeteries and memorial sites in the county.