Crawford County, OH Genweb Project a collection of online resources for genealogy researchers
Crawford County Obituaries
Crawford County Ohio Chapter of the Ohio Genealogical Society
Crawford County, OH Genealogy Forum read and post messages about your ancestors for this county
Crawford Co. Surname Queries
The Tombstone Transcription Project - cemeteries for Crawford Co. OH
US GenWeb Archives for Crawford County cemeteries, newspapers, wills, military rosters etc recorded online

Additional Resources

Ohio Newspaper Search enter your ancestor's name to instantly search the world's largest newspaper archive; over 12 million newspaper pages
Ohio Birth Records
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Ohio Death Records