The size of Grassy is approximately 14.5 square kilometres. It has 6 parks covering nearly 15.2% of total area. The population of Grassy in 2011 was 279 people. By 2016 the population was 145 showing a population decline of 48.0% in the area during that time. The predominant age group in Grassy is 60-69 years. Households in Grassy are primarily childless couples and are likely to be repaying $450 - $599 per month on mortgage repayments. In general, people in Grassy work in a labourer occupation. In 2011, 63.5% of the homes in Grassy were owner-occupied compared with 62.5% in 2016. Currently the median sales price of houses in the area is $86,500.