The size of Millendon is approximately 6.9 square kilometres. The population of Millendon in 2011 was 505 people. By 2016 the population was 508 showing a population growth of 0.6% in the area during that time. The predominant age group in Millendon is 50-59 years. Households in Millendon are primarily couples with children and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Millendon work in a managers occupation. In 2011, 76.5% of the homes in Millendon were owner-occupied compared with 77.3% in 2016. Currently the median sales price of houses in the area is $915,000.