The size of Streatham is approximately 149.5 square kilometres. It has 2 parks covering nearly 0.2% of total area. The population of Streatham in 2011 was 297 people. By 2016 the population was 168 showing a population decline of 43.4% in the area during that time. The predominant age group in Streatham is 50-59 years. Households in Streatham are primarily childless couples and are likely to be repaying not stated per month on mortgage repayments. In general, people in Streatham work in a managers occupation. In 2011, 76.8% of the homes in Streatham were owner-occupied compared with 75.5% in 2016.