DemographicsYallambie is approximately 2.93 square kilometres. In 2016 the population of Yallambie was 4117. The population is 52% male and 48% female. On average the monthly mortgage repayments in Yallambie are $1800 to $2399. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $275 to $349.