The size of Dederang is approximately 76.9 square kilometres. It has 4 parks covering nearly 42.8% of total area. The population of Dederang in 2011 was 311 people. By 2016 the population was 152 showing a population decline of 51.1% in the area during that time. The predominant age group in Dederang is 50-59 years. Households in Dederang are primarily childless couples and are likely to be repaying $800 - $999 per month on mortgage repayments. In general, people in Dederang work in a managers occupation. In 2011, 72.3% of the homes in Dederang were owner-occupied compared with 72.9% in 2016.