The size of Dinner Plain is approximately 26.2 square kilometres. It has 3 parks covering nearly 58.2% of total area. The population of Dinner Plain in 2011 was 144 people. By 2016 the population was 227 showing a population growth of 57.6% in the area during that time. The predominant age group in Dinner Plain is 40-49 years. Households in Dinner Plain are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Dinner Plain work in a managers occupation. In 2011, 46.8% of the homes in Dinner Plain were owner-occupied compared with 60.5% in 2016. Currently the median sales price of houses in the area is $705,000.