Cornish Australians are citizens of Australia who are fully or partially of Cornish heritage or descent, i.e. hailing from Cornwall in England, United Kingdom. They form part of the worldwide Cornish diaspora, which also includes large numbers of people in the US, Canada, New Zealand, South Africa, Mexico and many Latin American countries. Cornish Australians are thought to make up around 4.3 per cent of the Australian population and are thus one of the largest ethnic groups in Australia.