The size of Winnininnie is approximately 368.1 square kilometres. It has 1 park covering nearly 0.6% of total area. The population of Winnininnie in 2006 was 103 people. By 2011 the population was 493 showing a population growth of 378.6% in the area during that time. The predominant age group in Winnininnie is 50-59 years. Households in Winnininnie are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Winnininnie work in a managers occupation. In 2006, 16.7% of the homes in Winnininnie were owner-occupied compared with 56.4% in 2011.