The size of Glenarbon is approximately 290.2 square kilometres. It has 1 park covering nearly 49.8% of total area. The population of Glenarbon in 2011 was 1,159 people. By 2016 the population was 22 showing a population decline of 98.1% in the area during that time. The predominant age group in Glenarbon is 70-79 years. Households in Glenarbon are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Glenarbon work in a managers occupation. In 2011, 66.9% of the homes in Glenarbon were owner-occupied compared with 80% in 2016.