The size of Sladevale is approximately 35.5 square kilometres. The population of Sladevale in 2011 was 468 people. By 2016 the population was 365 showing a population decline of 22.0% in the area during that time. The predominant age group in Sladevale is 60-69 years. Households in Sladevale are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Sladevale work in a trades occupation. In 2011, 86.1% of the homes in Sladevale were owner-occupied compared with 89.5% in 2016. Currently the median sales price of houses in the area is $520,750.