DemographicsSedgefield is approximately 14.75 square kilometres. In 2016 the population of Sedgefield was 184. The population is 54% male and 46% female. On average the monthly mortgage repayments in Sedgefield are $2400 to $2999. The most common weekly income bracket is $2000 to $2999 per week. Weekly rents in the area are on average $0 to $74.