The size of Mount Rumney is approximately 7.7 square kilometres. It has 1 park. The population of Mount Rumney in 2011 was 443 people. By 2016 the population was 280 showing a population decline of 36.8% in the area during that time. The predominant age group in Mount Rumney is 60-69 years. Households in Mount Rumney are primarily childless couples and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Mount Rumney work in a professional occupation. In 2011, 93% of the homes in Mount Rumney were owner-occupied compared with 87.5% in 2016.