Childhood exposure to domestic violence (EDV) is known to have adverse impacts on health and wellbeing, and EDV is now considered a form of child maltreatment. However, to date, there is no nationally representative data to show how widespread EDV is in Australia, or to indicate the magnitude of its associated health outcomes and impact on revictimization in adulthood. This is a major problem for science, policy, and public health. This presentation will discuss the nature and significance of the Australian Child Maltreatment Study (ACMS). The ACMS is the first study to obtain reliable data regarding the national prevalence, nature, health outcomes and burden of disease of all forms of child maltreatment, including EDV, in Australia. It will survey up to 10,000 Australians aged 16 years and older about their experiences in childhood, as well as their current physical and mental health outcomes. The ACMS has four main aims: (1) To gather prevalence data on the five forms of child maltreatment (sexual abuse, physical abuse, emotional abuse, neglect, and exposure to domestic violence) and multitype maltreatment; (2) To detail the nature of these experiences (e.g., the child’s age and sex; the child’s relationship with the maltreating person; frequency and severity; parental risk factors); (3) To assess the impact of maltreatment on mental health, physical health, and other risk behaviours (e.g., alcohol and drug use); and (4) To assess the burden of disease to the nation. Importantly, the ACMS also measures adult exposure to intimate partner violence (IPV), including coercive control, and examines associations between EDV in childhood and revictimization through IPV in adulthood. Data collection will be completed in late 2021 and we anticipate presenting preliminary data. We will situate the ACMS in the current social policy context and discuss the policy and practice impacts of accurate prevalence data.