The size of Joadja is approximately 94.4 square kilometres. It has 2 parks covering nearly 7.8% of total area. The population of Joadja in 2011 was 388 people. By 2016 the population was 120 showing a population decline of 69.1% in the area during that time. The predominant age group in Joadja is 50-59 years. Households in Joadja are primarily childless couples and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Joadja work in a managers occupation. In 2011, 79% of the homes in Joadja were owner-occupied compared with 97.4% in 2016.