The size of Armstrong Creek is approximately 18.7 square kilometres. It has 4 parks covering nearly 0.8% of total area. The population of Armstrong Creek in 2011 was 353 people. By 2016 the population was 4,237 showing a population growth of 1100.3% in the area during that time. The predominant age group in Armstrong Creek is 30-39 years. Households in Armstrong Creek are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Armstrong Creek work in a professional occupation. In 2011, 88.5% of the homes in Armstrong Creek were owner-occupied compared with 73.1% in 2016. Currently the median sales price of houses in the area is $603,000.