DemographicsTrawalla is approximately 73.45 square kilometres. In 2016 the population of Trawalla was 141. The population is 49% male and 51% female. On average the monthly mortgage repayments in Trawalla are $1000 to $1399. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $0 to $74.