The size of Tarpeena is approximately 39.2 square kilometres. The population of Tarpeena in 2011 was 355 people. By 2016 the population was 447 showing a population growth of 25.9% in the area during that time. The predominant age group in Tarpeena is 40-49 years. Households in Tarpeena are primarily childless couples and are likely to be repaying $600 - $799 per month on mortgage repayments. In general, people in Tarpeena work in a labourer occupation. In 2011, 86% of the homes in Tarpeena were owner-occupied compared with 80.9% in 2016. Currently the median sales price of houses in the area is $129,000.