The size of Longley is approximately 7.7 square kilometres. It has 5 parks covering nearly 3.2% of total area. The population of Longley in 2011 was 246 people. By 2016 the population was 233 showing a population decline of 5.3% in the area during that time. The predominant age group in Longley is 40-49 years. Households in Longley are primarily couples with children. In general, people in Longley work in a professional occupation. In 2011, 90.9% of the homes in Longley were owner-occupied compared with 89% in 2016.