The size of Whyalla is approximately 9.6 square kilometres. It has 13 parks covering nearly 4.9% of total area. The population of Whyalla in 2011 was 3,732 people. By 2016 the population was 3,615 showing a population decline of 3.1% in the area during that time. The predominant age group in Whyalla is 50-59 years. Households in Whyalla are primarily childless couples and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Whyalla work in a professional occupation. In 2011, 66.7% of the homes in Whyalla were owner-occupied compared with 67.7% in 2016. Currently the median sales price of houses in the area is $289,250.