Geoffrey Lehmann (born 28 June 1940) is an Australian poet, children's writer, and tax lawyer. Lehmann grew up in McMahon's Point, Sydney, and attended the Shore School in North Sydney. He graduated in arts and law from the University of Sydney in 1960 and 1963 respectively. In 1961, he demonstrated in a student newspaper article that fellow student Robert Hughes had published plagiarised poetry by Terence Tiller and others, and a drawing by Leonard Baskin.
Lehmann was the first Australian poet to be published by the London publishing house Faber and Faber.
Lehmann has worked as a solicitor in his own small law firm, as an academic lawyer at the University of New South Wales, and as a corporate tax lawyer, having retired from PricewaterhouseCoopers. He continues to write as a literary reviewer for The Australian newspaper.