Aika may refer to:
- Agent Aika, an anime OVA produced by Bandai Visual & Studio Fantasia
- Aika is a name for Aikakone, a Finnish musical group
- Aika is an ancient name of Troia (FG), Italy
- Aika (album)
- Aika is a character, see List of Skies of Arcadia characters
- Aika is an Indian short film directed by Gulzar (lyricist) in 1984
- AIKA Online is an MMORPG.
- AIKA is an Information Technology organization based out of Saudi Arabia.].