L39 or L-39 may refer to:
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60S ribosomal protein L39
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Aero L-39 Albatros
The Aero L-39 Albatros is a high-performance jet trainer designed and produced by Aero Vodochody in the Czech Republic. In addition to performing basic and advanced pilot training, it has also flown combat missions in a light-attack role. Desp ...
, a Czechoslovak jet trainer
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Bell L-39, an American experimental aircraft
* , a destroyer of the Royal Navy
* , a sloop of the Royal Navy
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Lahti L-39, an anti-tank rifle
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Mitochondrial ribosomal protein L39
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Ramona Airport, in San Diego County, California
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