The size of Foster is approximately 116.3 square kilometres. It has 5 parks covering nearly 0.9% of total area. The population of Foster in 2011 was 1,678 people. By 2016 the population was 1,868 showing a population growth of 11.3% in the area during that time. The predominant age group in Foster is 60-69 years. Households in Foster are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Foster work in a managers occupation. In 2011, 74.1% of the homes in Foster were owner-occupied compared with 73.1% in 2016. Currently the median sales price of houses in the area is $512,500.