This report presents information on the youth detention population in Australia, focusing on quarterly trends from June 2010 to June 2014. On an average night, close to 1,000 young people were in detention, about half of whom were unsentenced. Nationally, numbers and rates of young people in detention remained relatively stable over the 4 years; but trends varied among states and territories. About half of all young people in detention on an average night were Indigenous.