The size of Rainbow Flat is approximately 35.8 square kilometres. It has 6 parks covering nearly 1.3% of total area. The population of Rainbow Flat in 2011 was 667 people. By 2016 the population was 672 showing a population growth of 0.7% in the area during that time. The predominant age group in Rainbow Flat is 60-69 years. Households in Rainbow Flat are primarily childless couples and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Rainbow Flat work in a professional occupation. In 2011, 82.6% of the homes in Rainbow Flat were owner-occupied compared with 93.2% in 2016. Currently the median sales price of houses in the area is $850,000.