Jan Daniel Preysler, also known as Johan Daniel Preyssler or Johann Daniel Preyßler (1768, Prague – 23 April 1839) was a Czech entomologist.
In 1789 he became an adjunct to the Imperial administrative office in Prague, where he was in 1801 promoted to Administrator, and in 1805 became a Counselor. After that, in 1807 he was board member of the St. John the Baptist Orphanage in Prague. Between 1808 and 1832 are no records of his life—he probably lived outside Prague or abroad. He returned to Bohemia in 1833 as a mining engineer in Zbiroh. Preysler worked mainly on Coleoptera but also on other insects and spiders.