The size of Koppio is approximately 167 square kilometres. It has 2 parks. The population of Koppio in 2011 was 1,826 people. By 2016 the population was 51 showing a population decline of 97.2% in the area during that time. The predominant age group in Koppio is 40-49 years. Households in Koppio are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Koppio work in a managers occupation. In 2011, 69.6% of the homes in Koppio were owner-occupied compared with 75% in 2016.