Gustav von Paykull (August 21, 1757 – January 28, 1826) was a Swedish friherre (circa baron) and hovmarskalk ('court marshall', a court office), ornithologist and entomologist.
He was a member of the Royal Swedish Academy from 1791 and a founder of the natural history museum (Naturhistoriska Riksmuseet) in Stockholm, through his 1819 donation of his extensive zoological collections to the academy.
His best known publications are:
(3 volumes,1798,1799,1800)
Paykull's collection is in the Swedish Museum of Natural History