The size of Mermaid Beach is approximately 1.5 square kilometres.

It has 11 parks covering nearly 4% of total area. The population of Mermaid Beach in 2011 was 5,722 people. By 2016 the population was 6,524 showing a population growth of 14.0% in the area during that time.

The predominant age group in Mermaid Beach is 20-29 years.

Households in Mermaid Beach are primarily childless couples and are likely to be repaying $1400 – $1799 per month on mortgage repayments.

In general, people in Mermaid Beach work in a professional occupation.

In 2011, 41.3% of the homes in Mermaid Beach were owner-occupied compared with 43.5% in 2016.