Dia may refer to:
- The recurring spell.
- The element from Final Fantasy.
- The status effect from Final Fantasy XI.
- Oerban clan from Final Fantasy XIII.
"Dia" and "Día" mean "day" in Portuguese and Spanish.
In ancient Greek religion and folklore, Dia means "heavenly," "divine," or "she who belongs to Zeus." The name is actually attributed to several figures thus is treated like an honorific or title.
In the original Japanese release of Final Fantasy, "Dia" was an abbreviation for "Dispel Undead", as the "u" is written as an "a" in that language. When it was later realized that "Dia" and "Día" mean "day" in Portuguese and Spanish, the name was applied to other localization as a play on the idea that sunlight is harmful to the undead.