The Sri Lankan High Commissioner to Australia is the Sri Lankan envoy to Australia. Countries belonging to the Commonwealth of Nations typically exchange High Commissioners, rather than Ambassadors. Though there are a few technical differences (for instance, whereas Ambassadors present their diplomatic credentials to the host country's head of state, High Commissioners are accredited to the head of government), they are in practice one and the same office. The Sri Lankan High Commissioner to Australia is concurrently accredited as High Commissioner to New Zealand, Papua New Guinea, and Fiji.
The Sri Lankan government has not appointed a high commissioner to this posting since 2020. Former high commissioners include: