 The median age of the Runcorn population is 31 years, 6 years below the Australian median.45.4% of people living in Runcorn were born in Australia, compared to the national average of 69.8%; the next most common countries of birth were China 9.2%, India 4.7%, New Zealand 4%, Taiwan 3.8%, Korea, Republic of 3.8%.50% of people spoke only English at home; the next most common languages were 13.5% Mandarin, 6.4% Cantonese, 4.2% Korean, 2.2% Punjabi, 2% Vietnamese.