The Australian Census Longitudinal Dataset (ACLD) is Australia's largest longitudinal dataset bringing together a 5% random sample of around one million records from the 2006 Census with corresponding records from the 2011 Census. It provides a unique opportunity for researchers and policy makers to examine pathways and transitions of population groups, such as unemployed individuals transition into the labour force. Over time, the ACLD will continue to grow as records from each new Census are linked which will further enhance its longitudinal view. The ACLD will also be augmented in the future to take account of migration and births that occur between Censuses.