The size of Millaroo is approximately 57.7 square kilometres. It has 16 parks covering nearly 8.3% of total area. The population of Millaroo in 2011 was 199 people. By 2016 the population was 96 showing a population decline of 51.8% in the area during that time. The predominant age group in Millaroo is 10-19 years. Households in Millaroo are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Millaroo work in a managers occupation. In 2011, 66.6% of the homes in Millaroo were owner-occupied compared with 54.6% in 2016.