Paul Hahnel (born 17 April 1843, Schlegenburg in Leobsanütz, Silesia and died 12 May 1887, Manicore) was a collector of Lepidoptera and Coleoptera.
He travelled in Venezuela (1877/79), and made two expeditions to the Amazon.
His collection was sold to Otto Staudinger and Andreas Bang-Haas.
Based on Hahnel's collection of frogs from Yurimaguas, Peru, George Albert Boulenger described eight new species and named one of them, Ameerega hahneli, after him.
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