The size of Halidon is approximately 127.6 square kilometres. The population of Halidon in 2011 was 229 people. By 2016 the population was 6 showing a population decline of 97.4% in the area during that time. The predominant age group in Halidon is 50-59 years. Households in Halidon are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Halidon work in a managers occupation. In 2006, 23.2% of the homes in Halidon were owner-occupied compared with 80.7% in 2011.