The size of Calder is approximately 59.9 square kilometres. It has 15 parks covering nearly 31.7% of total area. The population of Calder in 2011 was 376 people. By 2016 the population was 208 showing a population decline of 44.7% in the area during that time. The predominant age group in Calder is 50-59 years. Households in Calder are primarily childless couples and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Calder work in a trades occupation. In 2011, 79% of the homes in Calder were owner-occupied compared with 85.1% in 2016. Currently the median sales price of houses in the area is $121,250.