Dear Australian Institute of Criminology,
What percentage of the Australian population has a criminal record?
[Subject only] [DLM=For-Official-Use-Only]Automatic reply: Freedom of Information request - Percentage of Australians with criminal record
I have been on leave and returned this week. Sorry I haven't replied earlier.
There is no source of information that would cover this. The only feasible source would be the Australian Census, if it were to include a question about whether the person completing the survey and others in the household have a criminal record - but it doesn't.
Other sources provide data on only specific parts of the population, eg, prisoners.
In any case, information would be reduced by the Spent Convictions Schemes that operate in all jurisdictions, allowing people with criminal records to legally deny the existence of that record in quite broad circumstances.
So the data does not exist in any meaningful way.