The size of Caltowie is approximately 111.4 square kilometres. It has 4 parks covering nearly 0.3% of total area. The population of Caltowie in 2011 was 179 people. By 2016 the population was 115 showing a population decline of 35.8% in the area during that time. The predominant age group in Caltowie is 50-59 years. Households in Caltowie are primarily childless couples and are likely to be repaying $600 - $799 per month on mortgage repayments. In general, people in Caltowie work in a managers occupation. In 2011, 79.1% of the homes in Caltowie were owner-occupied compared with 78% in 2016.