The size of Malbina is approximately 1.2 square kilometres. It has 3 parks covering nearly 3.1% of total area. The population of Malbina in 2011 was 804 people. By 2016 the population was 54 showing a population decline of 93.3% in the area during that time. The predominant age group in Malbina is 50-59 years. Households in Malbina are primarily childless couples and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Malbina work in a labourer occupation. In 2011, 88.2% of the homes in Malbina were owner-occupied compared with 64.5% in 2016.