Stephen Donald Hopper AC FLS FTSE (born 18 June 1951) is a Western Australian botanist, graduated in Biology, specialising in conservation biology and vascular plants. He has written eight books, and has over 200 publications to his name. He was Director of Kings Park in Perth for seven years, and CEO of the Botanic Gardens and Parks Authority for five. He is currently Foundation Professor of Plant Conservation Biology at The University of Western Australia. He was Director of the Royal Botanic Gardens, Kew from 2006 to 2012.
This botanist is denoted by the author abbreviation Hopper when citing a botanical name.
On 1 January 2001, Hopper was awarded the Centenary Medal for his "service to the community". On 11 June 2012, Hopper was named a Companion of the Order of Australia for "eminent service as a global science leader in the field of plant conservation biology, particularly in the delivery of world class research programs contributing to the conservation of endangered species and ecosystems."
In 2015 he moved to Albany, and he has returned to his interest in Anigozanthus