Dirk Cornelis Geijskes (16 May 1907 – 27 September 1985) was a Dutch biologist, ethnologist and curator. He was the first director of the Surinaams Museum. As a biologist, he specialised in dragonflies. He would lead many expeditions into the interior of Suriname. In 1967, he became curator at the Rijksmuseum van Natuurlijke Historie where he started the dragonfly collection. Geijskes is the author of 123 publications, and 25 species have been named after him.