The size of Walhalla is approximately 101.2 square kilometres. It has 5 parks covering nearly 72.2% of total area. The population of Walhalla in 2011 was 324 people. By 2016 the population was 13 showing a population decline of 96.0% in the area during that time. The predominant age group in Walhalla is 50-59 years. Households in Walhalla are primarily childless couples and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Walhalla work in a managers occupation. In 2011, 80.5% of the homes in Walhalla were owner-occupied compared with 130% in 2016.