DemographicsMuscle Creek is approximately 88.51 square kilometres. In 2016 the population of Muscle Creek was 315. The population is 53% male and 47% female. On average the monthly mortgage repayments in Muscle Creek are $1800 to $2399. The most common weekly income bracket is $2000 to $2999 per week. Weekly rents in the area are on average $0 to $74.