DemographicsLower Wattle Grove is approximately 4.8 square kilometres. In 2016 the population of Lower Wattle Grove was 89. The population is 55% male and 45% female. On average the monthly mortgage repayments in Lower Wattle Grove are $0 to $299. The most common weekly income bracket is $400 to $499 per week. Weekly rents in the area are on average $225 to $275.