The size of Mermaid Waters is approximately 6 square kilometres. It has 7 parks covering nearly 10% of total area. The population of Mermaid Waters in 2006 was 11,647 people. By 2011 the population was 11,796 showing a population growth of 1% in the area during that time. The predominant age group in Mermaid Waters is 0-14 years.
Households in Mermaid Waters are primarily couples with children and are likely to be repaying between $1800 – $2400 per month on mortgage repayments.
In general, people in Mermaid Waters work in a non-specific occupation. In 2006, 66.8% of the homes in Mermaid Waters were owner-occupied compared with 64.9% in 2011.
Currently the median sales price of houses in the area is 630,000.