Australian People The population of Australia is 18,438,824.The Birth Rate is 13.73, per 1000 people. The death rate is 6.89 per 1000 people. Those two were per year on average. The migration rate is 2.71 immigrants per 1000 people. The Life expectancy is higher than the US at 79.64. (Male 76.69, Female 82.74) There are three major ethnic groups in Australia. The Caucasian makes up 95%, the Asians make up 4%, and the Aboriginal make up 1%. The official language of Australia is English. It is spoken by more than 99% of the population. The languages come from Europe and Oceania. (Australia, New Zealand