The size of Miena is approximately 111.1 square kilometres. It has 10 parks covering nearly 11.7% of total area. The population of Miena in 2011 was 302 people. By 2016 the population was 82 showing a population decline of 72.8% in the area during that time. The predominant age group in Miena is 60-69 years. Households in Miena are primarily childless couples and are likely to be repaying $600 - $799 per month on mortgage repayments. In general, people in Miena work in a trades occupation. In 2011, 80.4% of the homes in Miena were owner-occupied compared with 80.6% in 2016. Currently the median sales price of houses in the area is $280,000.