The size of Leppington is approximately 21.2 square kilometres. It has 5 parks covering nearly 3.4% of total area. The population of Leppington in 2016 was 3498 people. By 2021 the population was 9423 showing a population growth of 169.4% in the area during that time. The predominant age group in Leppington is 30-39 years. Households in Leppington are primarily couples with children and are likely to be repaying $2400 - $2999 per month on mortgage repayments. In general, people in Leppington work in a professional occupation.In 2021, 72.10% of the homes in Leppington were owner-occupied compared with 66.50% in 2016..
Leppington has 7,918 properties. Over the last 5 years, Houses in Leppington have seen a 67.56% increase in median value, while Units have seen a 21.81% increase. As at 31 July 2025:
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Population 9,423
0-9
19%
10-19
11%
20-29
13%
30-39
21%
40-49
13%
50-59
8%
60-69
7%
70-79
6%
80-89
2%