Esmeralda may refer to one of several ships in Spanish Navy history:

• Frigate Esmeralda, launched in Cartagena in 1753.
• Frigate Esmeralda, launched in Cartagena in 1773.
• Esmeralda, launched in Mahón in 1791, was a sail frigate captured by Chile in 1820.

Esmeralda may refer to one of several ships in Chilean Navy history:

• Esmeralda, a sail frigate captured from Spain in 1820 during the War of Independence.
• Esmeralda, launched in 1855, was a wooden steam corvette sunk during the War of the Pacific.
• Cruiser Esmeralda, launched in 1883, purchased by Japan in 1894 and renamed Izumi.
• Cruiser Esmeralda, launched in 1895.
• Esmeralda, launched in 1944, was a River-class frigate originally in the service of the Canadian Navy as HMCS Glace Bay.
• Training ship Esmeralda (BE-43), launched in 1953, is a steel-hulled four-masted barquentine tall ship in the Chilean Navy, it is a symbol of the Chilean navy and it's nicknamed the "White Lady". According to recent testimonies, it was used for a few days as a detention center during 1973. Despite that fact it is still the most known and beloved ship of the navy.

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