The size of Killarney is approximately 78.5 square kilometres. It has 10 parks covering nearly 0.8% of total area. The population of Killarney in 2011 was 983 people. By 2016 the population was 982 showing a population decline of 0.1% in the area during that time. The predominant age group in Killarney is 60-69 years. Households in Killarney are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Killarney work in a managers occupation. In 2011, 69% of the homes in Killarney were owner-occupied compared with 68.9% in 2016. Currently the median sales price of houses in the area is $249,000.