This poster provides an overview of Health Data Australia. Health Data Australia is a national catalogue of Australian clinical trials data designed to facilitate access, sharing and reuse of health research data. Health and medical researchers can use the platform to discover and request access to data for their own research, or to register descriptions of their data to enhance discoverability by others. Health Data Australia was developed by the Australian Research Data Commons (ARDC) in partnership with the health research community across Australia via the Health Studies Australian National Data Asset (HeSANDA) program. Health Data Australia contains contributions from 72 health research organisations across the country, organised into 9 nodes. Discover clinical trials data and learn how to register descriptions of your data. Visit - https://bit.ly/ardc-hda