How do I find someone in Adalaide Australia?

The most reliable way to find someone in Australia is to use the current electoral roll (which is a public document). You can inspect it at Australian Electoral Offices or State Libraries. Almost all adult citizens will appear on the electoral roll, as compared to the phone book that often lists only one household members by initials (rather than full name) and often many households elect not to be listed in the phone book. While anyone can choose to have an unlisted phone number, it is much harder to be "unlisted" in the electoral roll. Enrolment and voting is compulsory in Australia, so most people are on the electoral roll. The only people whose names are not on the public listings of the electoral roll are people who can demonstrate that their personal safety would be at risk if their details were included (this is normally famous people and those who have had problems with stalkers, abusive partners, etc).

if u know the name and address then i suggest the white pages or phone 1234-that will give u directory assistance

Adelaide, Ask me? Give me the name and I;ll do my best, I live here and know heaps, Cheers Pete.