The taxon authority Toyama or Tôyama may refer to:
- Hironori Toyama (fl. 2015; H.Toyama), Japanese botanist
- Masanao Toyama Herpetologist
- Masao Tôyama Entomologist
- Reizo Toyama (1913–1947), Japanese botanist
- Shiro Toyama (1901–1932), Japanese botanist and palaeobotanist
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