Data Connect Australia (DCA) is Australia’s primary national research infrastructure for linked administrative data, underpinning world‑leading health and social research and enabling innovation at scale. Through a coordinated national network of data linkage units, secure research environments, and specialist tools, DCA enables researchers to find, link, access, and analyse health and human services data safely, efficiently, and responsibly. This trusted infrastructure is critical to unlocking the value of Australia’s administrative data while maintaining the highest standards of privacy, security, and governance. By partnering with researchers, governments, industry, and data custodians, DCA provides the essential, nationally coordinated capability that makes large‑scale, cross‑jurisdictional data‑driven research possible, supporting evidence‑based policy, improved services, and better outcomes for Australians.