The size of Darnum is approximately 38.3 square kilometres. It has 2 parks covering nearly 0.9% of total area. The population of Darnum in 2011 was 668 people. By 2016 the population was 750 showing a population growth of 12.3% in the area during that time. The predominant age group in Darnum is 10-19 years. Households in Darnum are primarily couples with children and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Darnum work in a trades occupation. In 2011, 90% of the homes in Darnum were owner-occupied compared with 86.7% in 2016. Currently the median sales price of houses in the area is $294,000.