The size of Millstream is approximately 195.3 square kilometres. It has 8 parks covering nearly 29.4% of total area. The population of Millstream in 2011 was 1,070 people. By 2016 the population was 1,238 showing a population growth of 15.7% in the area during that time. The predominant age group in Millstream is 60-69 years. Households in Millstream are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Millstream work in a labourer occupation. In 2011, 81.6% of the homes in Millstream were owner-occupied compared with 79.5% in 2016. Currently the median sales price of houses in the area is $320,000.