The size of Wallaroo Plain is approximately 99.7 square kilometres. It has 1 park covering nearly 0.1% of total area. The population of Wallaroo Plain in 2011 was 38 people. By 2016 the population was 49 showing a population growth of 28.9% in the area during that time. The predominant age group in Wallaroo Plain is 0-9 years. Households in Wallaroo Plain are primarily childless couples and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Wallaroo Plain work in a managers occupation. In 2011, 82.3% of the homes in Wallaroo Plain were owner-occupied compared with 57.2% in 2016.