This bulletin presents information on the youth detention population in Australia, focusing on quarterly trends from June 2012 to June 2016. There were just over 900 young people in detention on an average night in the June quarter 2016, just over half (57%) of whom were unsentenced. Numbers and rates of young people in detention dropped slightly over the 4 years, despite a slight increase in the most recent year. Just over half (55%) of all young people in detention on an average night were Indigenous.