I have noticed a number of searches on the topic of ethnicity in the Sydney suburb of Hurstville. HSC essay perhaps?
This search brings them to Economic and demographic change, education, ethnicity and the maintenance of social cohesion in Australia simply because the post contains a reference to Hurstville. So they won't be helped.
The best way of getting data on ethnicity in particular areas is via search on the ABS census data. Here there are two posts that will directly help you to do this:
- How to find and use Australian census data 1 - Languages spoken at home case study
- How to find and use Australian census data 2 - Creating maps and other nice things
The immediate need for information on Hurstville may have passed by the time this post is written. Still, the post may help in future.