The size of Allens Rivulet is approximately 12 square kilometres. It has 7 parks covering nearly 11.8% of total area. The population of Allens Rivulet in 2011 was 468 people. By 2016 the population was 474 showing a population growth of 1.3% in the area during that time. The predominant age group in Allens Rivulet is 50-59 years. Households in Allens Rivulet are primarily couples with children. In general, people in Allens Rivulet work in a professional occupation. In 2011, 89.3% of the homes in Allens Rivulet were owner-occupied compared with 90.1% in 2016. Currently the median sales price of houses in the area is $540,500.