The size of Koonibba is approximately 203.2 square kilometres. It has 2 parks. The population of Koonibba in 2011 was 501 people. By 2016 the population was 134 showing a population decline of 73.3% in the area during that time. The predominant age group in Koonibba is 0-9 years. Households in Koonibba are primarily single parents and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Koonibba work in a community and personal service occupation. In 2006, 33.6% of the homes in Koonibba were owner-occupied compared with 62.3% in 2011.