DemographicsSt Arnaud East is approximately 71.69 square kilometres. In 2016 the population of St Arnaud East was 81. The population is 48% male and 52% female. On average the monthly mortgage repayments in St Arnaud East are $800 to $999. The most common weekly income bracket is $400 to $499 per week. Weekly rents in the area are on average $0 to $74.