DemographicsLethbridge is approximately 88.32 square kilometres. In 2016 the population of Lethbridge was 1014. The population is 51% male and 49% female. On average the monthly mortgage repayments in Lethbridge are $1400 to $1799. The most common weekly income bracket is $650 to $799 per week. Weekly rents in the area are on average $275 to $349.