The size of Brewster is approximately 52.6 square kilometres. The population of Brewster in 2011 was 395 people. By 2016 the population was 32 showing a population decline of 91.9% in the area during that time. The predominant age group in Brewster is 40-49 years. Households in Brewster are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Brewster work in a managers occupation. In 2011, 80.9% of the homes in Brewster were owner-occupied compared with 57.2% in 2016.