The size of Brooker is approximately 381.8 square kilometres. It has 1 park. The population of Brooker in 2011 was 308 people. By 2016 the population was 61 showing a population decline of 80.2% in the area during that time. The predominant age group in Brooker is 50-59 years. Households in Brooker are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Brooker work in a managers occupation. In 2011, 71% of the homes in Brooker were owner-occupied compared with 88.4% in 2016.