The size of Macarthur is approximately 298.9 square kilometres. It has 1 park covering nearly 8.8% of total area. The population of Macarthur in 2011 was 617 people. By 2016 the population was 500 showing a population decline of 19.0% in the area during that time. The predominant age group in Macarthur is 50-59 years. Households in Macarthur are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Macarthur work in a managers occupation. In 2011, 81% of the homes in Macarthur were owner-occupied compared with 81.4% in 2016. Currently the median sales price of houses in the area is $135,000.