The key source of information about children and young people who come into contact with the youth justice sector is the information provided in the Youth Justice Board.
Y brif ffynhonnell o wybodaeth am blant a phobl ifanc sy'n dod i gysylltiad â'r sector cyfiawnder ieuenctid yw'r wybodaeth a ddarperir yn y Bwrdd Cyfiawnder Ieuenctid.