The size of Wynarka is approximately 315.1 square kilometres. The population of Wynarka in 2011 was 571 people. By 2016 the population was 64 showing a population decline of 88.8% in the area during that time. The predominant age group in Wynarka is 50-59 years. Households in Wynarka are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Wynarka work in a managers occupation. In 2011, 69.8% of the homes in Wynarka were owner-occupied compared with 74.3% in 2016.