The size of Yerra is approximately 54.9 square kilometres. It has 1 park covering nearly 0.1% of total area. The population of Yerra in 2011 was 169 people. By 2016 the population was 105 showing a population decline of 37.9% in the area during that time. The predominant age group in Yerra is 50-59 years. Households in Yerra are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Yerra work in a managers occupation. In 2011, 74.1% of the homes in Yerra were owner-occupied compared with 79.5% in 2016.