The size of Mandogalup is approximately 6.9 square kilometres. It has 2 parks covering nearly 0.1% of total area. The population of Mandogalup in 2011 was 59 people. By 2016 the population was 51 showing a population decline of 13.6% in the area during that time. The predominant age group in Mandogalup is 50-59 years. Households in Mandogalup are primarily single parents and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Mandogalup work in a labourer occupation. In 2011, 100% of the homes in Mandogalup were owner-occupied compared with 57.2% in 2016.