The size of Bumbunga is approximately 89.1 square kilometres. It has 1 park covering nearly 1.2% of total area. The population of Bumbunga in 2011 was 362 people. By 2016 the population was 7 showing a population decline of 98.1% in the area during that time. The predominant age group in Bumbunga is 50-59 years. Households in Bumbunga are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Bumbunga work in a managers occupation. In 2006, 27.1% of the homes in Bumbunga were owner-occupied compared with 70.7% in 2011.