The size of Marsfield is approximately 3.9 square kilometres. It has 27 parks covering nearly 22.7% of total area. The population of Marsfield in 2011 was 12,347 people. By 2016 the population was 13,282 showing a population growth of 7.6% in the area during that time. The predominant age group in Marsfield is 20-29 years. Households in Marsfield are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Marsfield work in a professional occupation. In 2011, 59.7% of the homes in Marsfield were owner-occupied compared with 55.4% in 2016. Currently the median sales price of houses in the area is $1,749,000.