Arda

• Arda (Middle-earth), fictional world in the works of J. R. R. Tolkien
• Arda (band), a Russian heavy metal band

• Arda (name)

• Arda (Maritsa), a river in Bulgaria and Greece
• Arda (Italy), a river in Italy
• Arda (Douro), a river in Portugal
• Arda, Bulgaria, a village in southern Bulgaria
• Arda, County Fermanagh, a townland in County Fermanagh, Northern Ireland
• Arda, Indiana, a community in the United States
• Arda Peak, in Antarctica

• Amphisbaena arda, Rodrigues, 2003, a worm lizard species in the genus Amphisbaena
• Perzelia arda, a moth species

• Advanced Research and Development Activity
• Association of Religion Data Archives

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