Difference PII VS Personal Data

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Not Equal

  • PII is a US term that has a much narrower definition than the EU personal data definition.
  • the two terms have a different legal scope of what is covered
  • We should use personal data for widest possible coverage
  • PII is a smaller subset of personal data (“identifiable” vs “real world”).


  • PII is internationally well defined in ISO/IEC 29100
  • don’t think that “Personal Data” vs “PII” is a difference that matters vis-a-vis the standard
  • PII and personal data actually are synonyms under some definitions.
  • personal data has a very broad meaning (as does "PII" as defined by the US GSA and by ISO)