Euboea is the second-largest island in Greece. The word may also refer to:
Euboea (constituency), electoral district in Greece Euboea (regional unit), an administrative division which includes the island Euboea (mythology), the name of several women in Greek myths 1119 Euboea, an asteroid, named after the island Euboea Montes, a volcano on the moon Io, also named after the island