Haas
The taxon authority (de) Haas may refer to:
- A.J.P. de Haas (fl. 1983, A.J.P.de Haas), botanist
- Alexander Haas, German herpetologist
- Andreas Bang-Haas (1846–1925, A. Bang-Haas), Danish entomologist, father of Otto Bang-Haas
- C. P. J. de Haas (de Haas), Dutch herpetologist
- Diane L. Haas, U.S. ichthyologist
- Ehrenfried Schenkel-Haas (1869–1953), Swiss zoologist and arachnologist
- Fabian Haas (born 1967), German entomologist
- Fritz Haas (1886–1969), German-American malacologist
- Georg Haas (1905–1981), Austrian-born Israeli herpetologist and paleontologist
- Kurt Haas Lamour (Lamour), phytopathologist, mycologist and microbiologist
- Otto Bang-Haas (1882–1948), German entomologist, son of Andreas Bang-Haas, grandson of Otto Staudinger
- Richard Haas (1969–1992), U.S. ichthyologist