The size of Warnes is approximately 2,628.3 square kilometres. It has 3 parks. The population of Warnes in 2006 was 683 people. By 2011 the population was 493 showing a population decline of 27.8% in the area during that time. The predominant age group in Warnes is 50-59 years. Households in Warnes are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Warnes work in a managers occupation. In 2006, 84.3% of the homes in Warnes were owner-occupied compared with 56.4% in 2011.