DemographicsHolwell is approximately 30.94 square kilometres. In 2016 the population of Holwell was 65. The population is 46% male and 54% female. On average the monthly mortgage repayments in Holwell are $1000 to $1399. The most common weekly income bracket is $300 to $399 per week. Weekly rents in the area are on average $225 to $275.