L39 or L-39 may refer to: 60S ribosomal protein L39 Aero L-39 Albatros, a Czechoslovakian jet trainer Bell L-39, an American experimental aircraft , a destroyer of the Royal Navy , a sloop of the Royal Navy Lahti L-39, an anti-tank rifle Mitochondrial ribosomal protein L39 Ramona Airport, in San Diego County, California