The size of Hay is approximately 132.8 square kilometres. It has 5 parks covering nearly 34.0% of total area. The population of Hay in 2016 was 332 people. By 2021 the population was 493 showing a population growth of 48.5% in the area during that time. The predominant age group in Hay is 60-69 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 2021, 83.80% of the homes in Hay were owner-occupied compared with 84.00% in 2016.
Hay has 533 properties. Over the last 5 years, Houses in Hay have seen a 85.14% increase in median value. As at 30 November 2025:
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