Arda or ARDA may refer to:
Arts and entertainment Arda (Middle-earth), fictional world in the works of J. R. R. Tolkien Arda (band), a Russian heavy metal band
People Arda (name)
Places 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 Peak, in Antarctica
Biology Amphisbaena arda, Rodrigues, 2003, a worm lizard species in the genus Amphisbaena Perzelia arda, a moth species
Acronym Advanced Research and Development Activity Association of Religion Data Archives