David Unaipon (born David Ngunaitponi; 28 September 1872 – 7 February 1967) was an indigenous Australian preacher, inventor, writer and activist. He was a member of the Ngarrindjeri nation. He was born at Point McLeay, a Lutheran mission located on the mouth of the Murray River southeast of Adelaide. He preached widely throughout South Australia, often travelling on foot. He became the first Aboriginal Australian to publish a written work in English.