The size of Warnoah is approximately 427.8 square kilometres. It has 5 parks covering nearly 9.5% of total area. The population of Warnoah in 2011 was 361 people. By 2016 the population was 61 showing a population decline of 83.1% in the area during that time. The predominant age group in Warnoah is 30-39 years. Households in Warnoah are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Warnoah work in a managers occupation. In 2011, 42.2% of the homes in Warnoah were owner-occupied compared with 52.4% in 2016.