DemographicsHorsley Park is approximately 21.97 square kilometres. In 2016 the population of Horsley Park was 1837. The population is 52% male and 48% female. On average the monthly mortgage repayments in Horsley Park are $4000+. The most common weekly income bracket is $300 to $399 per week. Weekly rents in the area are on average $350 to $449.