Technical notes

Youth detention data sources

This report was compiled using 2 data sources. States and territories provided data on the average nightly population per quarter between July 2022 and June 2023. These data were used to supplement the 2021–22 YJ NMDS, which contains data up to and including 30 June 2022 for all states and territories.

This report is not comparable with previous editions of Youth detention population in Australia. Previous editions contained differences in data formats, specifications, definitions and/or quality across jurisdictions. Comparisons between YJ NMDS and youth detention population data should be made with caution.

A data quality statement is available at Youth Justice NMDS 2021–22: Quality statement.