The size of Koonda is approximately 24.5 square kilometres. It has 1 park covering nearly 0.2% of total area. The population of Koonda in 2011 was 1,084 people. By 2016 the population was 13 showing a population decline of 98.8% in the area during that time. The predominant age group in Koonda is 60-69 years. Households in Koonda are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Koonda work in a managers occupation. In 2006, 31% of the homes in Koonda were owner-occupied compared with 80.1% in 2011.