DemographicsSeven Mile Beach is approximately 14.75 square kilometres. In 2016 the population of Seven Mile Beach was 1286. The population is 52% male and 48% female. On average the monthly mortgage repayments in Seven Mile Beach are $1800 to $2399. The most common weekly income bracket is $1000 to $1249 per week. Weekly rents in the area are on average $350 to $449.