The size of Halbury is approximately 160.5 square kilometres. The population of Halbury in 2011 was 462 people. By 2016 the population was 203 showing a population decline of 56.1% in the area during that time. The predominant age group in Halbury is 40-49 years. Households in Halbury are primarily childless couples and are likely to be repaying $800 - $999 per month on mortgage repayments. In general, people in Halbury work in a managers occupation. In 2011, 82.9% of the homes in Halbury were owner-occupied compared with 92.6% in 2016.