The size of Glan Devon is approximately 34.6 square kilometres. The population of Glan Devon in 2011 was 303 people. By 2016 the population was 247 showing a population decline of 18.5% in the area during that time. The predominant age group in Glan Devon is 60-69 years. Households in Glan Devon are primarily childless couples and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Glan Devon work in a trades occupation. In 2011, 85.8% of the homes in Glan Devon were owner-occupied compared with 85.5% in 2016. Currently the median sales price of houses in the area is $287,500.