Dietrich v The Queen is decision of the High Court of Australia. It is an important precedent in criminal and constitutional law, as it established a de-facto constitutional requirement that legal aid be provided to defendants in serious criminal trials. It ruled that judges should grant adjournments indefinitely in serious criminal trials, where an accused is unrepresented 'through no fault of their own'. Dietrich v R is the 69th most cited case of the High Court.