The size of Blackmans Bay is approximately 6.2 square kilometres. It has 20 parks covering nearly 5% of total area. The population of Blackmans Bay in 2011 was 6,728 people. By 2016 the population was 7,143 showing a population growth of 6.2% in the area during that time. The predominant age group in Blackmans Bay is 50-59 years. Households in Blackmans Bay are primarily couples with children. In general, people in Blackmans Bay work in a professional occupation. In 2011, 78.9% of the homes in Blackmans Bay were owner-occupied compared with 76.8% in 2016. Currently the median sales price of houses in the area is $560,000. Average length of home ownership is 12 years.