Clas Bjerkander (23 September 1735, Skara – 1 August 1795) was a Swedish meteorologist, botanist, and entomologist.
A Lutheran pastor, Bjerkander studied at the University of Uppsala.
With Anders Dahl he wrote Svenska Topographiska Sällskapet i Skara ("Schwedische topographische Gesellschaft zu Skara") and, as sole author several short scientific papers on Microlepidoptera.
Taxa named for him are
- Pyralis bjerkandriana (Mehlmotte)
- Bjerkandera adusta (Willd. ex Fr.) P. Karst.
In 1778, Bjerkander was elected a member of the Royal Swedish Academy of Sciences.
- Heinrich Dörfelt, Heike Heklau: Die Geschichte der Mykologie. 1998