Martia may refer to:

• Martia L. Davis Berry (1844-1894), social reformer
• Martia arizonella, of the genus Martia, a monotypic moth genus
• Oxyepoecus, an ant genus, one of whose former names was Martia
• Legio IV Martia, a legion of the Roman Empire
• Martia, a character in the 1991 film Star Trek VI: The Undiscovered Country

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