The size of Grass Patch is approximately 1,481.5 square kilometres. It has 26 parks covering nearly 4.4% of total area. The population of Grass Patch in 2011 was 491 people. By 2016 the population was 130 showing a population decline of 73.5% in the area during that time. The predominant age group in Grass Patch is 20-29 years. Households in Grass Patch are primarily couples with children and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Grass Patch work in a managers occupation. In 2011, 65.5% of the homes in Grass Patch were owner-occupied compared with 56.4% in 2016.