United States » Iowa » Counties » Plymouth » General Resources

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• American Genealogy & History Project

  [The original link is broken. This link points to an archived copy on the Wayback Machine]
  

• FamilySearch Wiki - Plymouth County, Iowa

  Free online genealogical research guide for Plymouth County, Iowa. Free online genealogical research guide for Adair County, Iowa.

• Linkpendium - Plymouth County, Iowa

• NACo (National Association of Counties) - County Explorer

• Plymouth County Courthouse History History

• USGenWeb

• USGenWeb Archives