The size of Llandilo is approximately 12.9 square kilometres. It has 1 park covering nearly 0.3% of total area. The population of Llandilo in 2011 was 1,597 people. By 2016 the population was 1,650 showing a population growth of 3.3% in the area during that time. The predominant age group in Llandilo is 10-19 years. Households in Llandilo are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Llandilo work in a clerical occupation. In 2011, 77.1% of the homes in Llandilo were owner-occupied compared with 72.8% in 2016. Currently the median sales price of houses in the area is $2,280,000.