The size of Triabunna is approximately 173.9 square kilometres. It has 40 parks covering nearly 6.1% of total area. The population of Triabunna in 2011 was 895 people. By 2016 the population was 898 showing a population growth of 0.3% in the area during that time. The predominant age group in Triabunna is 60-69 years. Households in Triabunna are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Triabunna work in a labourer occupation. In 2011, 70.4% of the homes in Triabunna were owner-occupied compared with 68.2% in 2016. Currently the median sales price of houses in the area is $400,000.