North TumbulgumNorth Tumbulgum is a locality in the Tweed Shire of New South Wales, Australia. It had a population of 238 as of the.DemographicsAs of the 2021 Australian census, 238 people resided in North Tumbulgum, down from 256 in the. The median age of persons in North Tumbulgum was 39 years. There were more males than females, with 56.7% of the population male and 43.3% female. The average household size was 2.9 people per household.