The term 'aging' is a good one to use when searching for statistics on this topic in combination with other more specific terms.
Look for the government agencies that publish data by age.
Many tables will be broken down "by age" but don't have aging in the title - tables don't have to be "about" aging to have relevant information.
Reports tend to have lots of statistics and findings from data analysis. Since they're usually published in PDF format, you can use a Google filter to find them.
aging prisoners site:.gov filetype:pdf
Or, to find reports at the state level:
aging prisoners site:.us filetype:pdf
Questions? Contact reference@carleton.edu
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