DemographicsMount Walker (Qld) is approximately 33.44 square kilometres. In 2016 the population of Mount Walker (Qld) was 134. The population is 52% male and 48% female. On average the monthly mortgage repayments in Mount Walker (Qld) are $1400 to $1799. The most common weekly income bracket is $800 to $999 per week. Weekly rents in the area are on average $275 to $349.