The size of Pennington is approximately 1.4 square kilometres. It has 9 parks covering nearly 3.9% of total area. The population of Pennington in 2011 was 3,648 people. By 2016 the population was 3,639 showing a population decline of 0.2% in the area during that time. The predominant age group in Pennington is 50-59 years. Households in Pennington are primarily couples with children and are likely to be repaying $1400 - $1799 per month on mortgage repayments. In general, people in Pennington work in a trades occupation. In 2011, 57.5% of the homes in Pennington were owner-occupied compared with 57.5% in 2016. Currently the median sales price of houses in the area is $506,000.