Abstract: The global Sydney thesis has been argued largely from an economic-centric perspective, focusing on Sydney’s integration with the world economy, and the effect of economic globalisation. This article employs a different perspective to approach global Sydney, and pays attention to its growing migration as a global city. Using inter-censual data in 2001 and 2011, a global migration index is built to measure the dynamics of global migration across the Sydney region. It provides a comprehensive understanding of migration in global Sydney in the beginning of the 21st century. The findings ascertain the spatial settlement pattern of growing migration in Sydney – a bifurcating structure of ethnic concentration with increasing ethnic intermixing, and provide directions for further research to investigate the associated social transformations.