Census-Online.com - census transcriptions for  Washington Co.
Interment.net - cemeteries of  Washington County
The Tombstone Transcription Project - cemeteries for Washington Co. OH
US GenWeb Archives for Washington County cemeteries, newspapers, wills, military rosters etc recorded online
Washington County, OH Genealogy Forum read and post messages about your ancestors for this county
Washington County, OH Genweb Project a collection of online resources for genealogy researchers

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
Ohio Marriage Records
Ohio Divorce Records
Ohio Death Records