The size of Hay is approximately 132.8 square kilometres. It has 9 parks covering nearly 0.6% of total area. The population of Hay in 2011 was 295 people. By 2016 the population was 326 showing a population growth of 10.5% in the area during that time. The predominant age group in Hay is 50-59 years. Households in Hay are primarily childless couples and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Hay work in a professional occupation. In 2011, 82.4% of the homes in Hay were owner-occupied compared with 84% in 2016. Currently the median sales price of houses in the area is $722,500.