Tweed Heads South is a suburb located on the Tweed River in the Northern Rivers region of New South Wales, Australia, in the Tweed Shire. In the 2011 census, Tweed Heads South recorded a population of 7,902 people, 53.3% female and 46.7% male. The median age of the Tweed Heads South population was 52 years, 15 years above the national …Tweed Heads South is a suburb located on the Tweed River in the Northern Rivers region of New South Wales, Australia, in the Tweed Shire. In the 2011 census, Tweed Heads South recorded a population of 7,902 people, 53.3% female and 46.7% male. The median age of the Tweed Heads South population was 52 years, 15 years above the national median of 37. 72.3% of people living in Tweed Heads South were born in Australia. The other top responses for country of birth were England 8.4%, New Zealand 3.5%, Scotland 1%, China 0.8%, Philippines 0.7%. 89.5% of people spoke only English at home; the next most common languages were 0.6% Mandarin, 0.3% Tagalog, 0.3% German, 0.3% Cantonese, 0.3% Thai.