The size of Penguin is approximately 45.4 square kilometres. It has 24 parks covering nearly 8.3% of total area. The population of Penguin in 2011 was 3,923 people. By 2016 the population was 3,847 showing a population decline of 1.9% in the area during that time. The predominant age group in Penguin is 50-59 years. Households in Penguin are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Penguin work in a professional occupation. In 2011, 74.7% of the homes in Penguin were owner-occupied compared with 75% in 2016. Currently the median sales price of houses in the area is $465,000.