The size of Tarneit is approximately 38.2 square kilometres. It has 30 parks covering nearly 2% of total area. The population of Tarneit in 2011 was 21,690 people. By 2016 the population was 34,562 showing a population growth of 59.3% in the area during that time. The predominant age group in Tarneit is 30-39 years. Households in Tarneit are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Tarneit work in a professional occupation. In 2011, 69.4% of the homes in Tarneit were owner-occupied compared with 67.7% in 2016. Currently the median sales price of houses in the area is $605,000.