Eris (/ˈɪərɪs, ˈɛrɪs/; Greek: Ἔρις Éris, "Strife") is the Greek goddess of strife and discord. Her Roman equivalent is Discordia, which means the same. Eris's Greek opposite is Harmonia, whose Roman counterpart is Concordia,[3] though she is also described as opposing Nike, counterpart of the Roman Victoria. Homer equated her with the war-goddess Enyo, whose Roman counterpart is Bellona. The dwarf planet Eris is named after the goddess.

She had no temples in ancient Greece and functions essentially as a personification, as which she appears in Homer and many later works.