The size of Berriwillock is approximately 253.8 square kilometres. It has 1 park. The population of Berriwillock in 2011 was 320 people. By 2016 the population was 202 showing a population decline of 36.9% in the area during that time. The predominant age group in Berriwillock is 50-59 years. Households in Berriwillock are primarily childless couples and are likely to be repaying $450 - $599 per month on mortgage repayments. In general, people in Berriwillock work in a managers occupation. In 2011, 79.5% of the homes in Berriwillock were owner-occupied compared with 77.8% in 2016.