DemographicsRhymney is approximately 53.27 square kilometres. In 2016 the population of Rhymney was 60. The population is 50% male and 50% female. On average the monthly mortgage repayments in Rhymney are $0 to $299. The most common weekly income bracket is $800 to $999 per week. Weekly rents in the area are on average $0 to $74.