Census-Online.com - census transcriptions for  Johnson Co.
Johnson County, IN Genealogy Forum read and post messages about your ancestors for this county
Johnson County Surnames
Johnson County, IN Genweb Project a collection of online resources for genealogy researchers
The Tombstone Transcription Project - cemeteries for Johnson Co. IN
US GenWeb Archives for Johnson County cemeteries, newspapers, wills, military rosters etc recorded online
World War II Honor List of Dead and Missing Personnel, Johnson County part 1 and part 2

Additional Resources

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