Johann Georg Wagler (28 March 1800 – 23 August 1832) was a German herpetologist and ornithologist.
Wagler was assistant to Johann Baptist von Spix, and gave lectures in zoology at the Ludwig-Maximilians-Universität München (LMU Munich) after it was moved to Munich. He worked on the extensive collections brought back from Brazil by Spix, and published partly together with him books on reptiles from Brazil. Wagler wrote Monographia Psittacorum (1832), which included the correct naming of the blue macaws.
In 1832, Wagler died of an accidental self-inflicted gunshot wound while out collecting in München-Moosach.
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