The size of Walliston is approximately 3.8 square kilometres. It has 1 park covering nearly 9.4% of total area. The population of Walliston in 2011 was 934 people. By 2016 the population was 930 showing a population decline of 0.4% in the area during that time. The predominant age group in Walliston is 40-49 years. Households in Walliston are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Walliston work in a trades occupation. In 2011, 82.5% of the homes in Walliston were owner-occupied compared with 85.1% in 2016. Currently the median sales price of houses in the area is $520,000.