DemographicsSeymour (Tas.) is approximately 17.46 square kilometres. In 2016 the population of Seymour (Tas.) was 25. The population is 28% male and 72% female. On average the monthly mortgage repayments in Seymour (Tas.) are $0 to $299. The most common weekly income bracket is $400 to $499 per week. Weekly rents in the area are on average $0 to $74.