United States » California » Counties » Contra Costa » General Resources

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• Contra Costa County, California (USGenWeb)

• FamilySearch Wiki - Contra_Costa County, California.

  Free online genealogical research guide for Contra_Costa County, California.

• Genealogy Inc. - Contra Costa County, California Facts, Genealogy, Records & Links

• Linkpendium - Contra Costa County, California

• NACo (National Association of Counties) - County Explorer

• Probate Case Files

  Index of Probate Case Files available for Contra Costa County, California. 1850-1920 Copying and research services available.

• USGenWeb Archives