The size of Tanunda is approximately 24.4 square kilometres. It has 24 parks covering nearly 1.2% of total area. The population of Tanunda in 2011 was 4,671 people. By 2016 the population was 4,598 showing a population decline of 1.6% in the area during that time. The predominant age group in Tanunda is 50-59 years. Households in Tanunda are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Tanunda work in a professional occupation. In 2011, 72.7% of the homes in Tanunda were owner-occupied compared with 71.8% in 2016. Currently the median sales price of houses in the area is $470,000.