Petersen
The taxon authority Petersen may refer to:
- Bent Petersen – Danish biologist
- Björn Petersen - Swedish entomologist
- Børge Petersen - Danish zoologist
- Claus Bo P. Petersen - Herpetologist
- Gitte Petersen (1963-, G.Petersen) - Danish botanist
- Günther Petersen (1924-2012) - German entomologist
- H. Cecilie B. Petersen - Annelidologist
- Henning Eiler Petersen (H.E.Petersen) - phycologist
- Mary E. Petersen - American annelidologist
- Matthew J. Petersen - entomologist
- Michael Petersen - German entomologist
- Otto Georg Petersen (1847-1937, Petersen) - Danish botanist
- Ronald H. Petersen (1934- , R.H.Petersen) - mycologist and lichenologist
- Wilhelm Petersen (1854-1933) - Estonian (Baltic-German) entomologist