The size of Nilma is approximately 4.1 square kilometres. The population of Nilma in 2011 was 225 people. By 2016 the population was 338 showing a population growth of 50.2% in the area during that time. The predominant age group in Nilma is 0-9 years. Households in Nilma are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Nilma work in a labourer occupation. In 2011, 90.5% of the homes in Nilma were owner-occupied compared with 87.5% in 2016.