Aika may refer to:
Arts and media
- Aika (album), a 1996 album by Finnish singer-songwriter Aki Sirkesalo
- Agent Aika, a 1997 anime OVA produced by Bandai Visual and Studio Fantasia
- AIKA Online, an MMORPG
- Aikakone or Aika, a Finnish musical group
- Aika, a character from the video game Skies of Arcadia
- Aika, a 1984 Indian short film directed by Gulzar (lyricist)
- "Aika", a song from the album Unified by Super8 & Tab
People
- Aika (singer), Japanese singer/songwriter
- , Japanese gravure idol and professional wrestler
- Aika Hakoyama (born 1991), Japanese synchronized swimmer
- Aika Kobayashi (born 1993), Japanese singer and voice actress
- , is a former member of the Japanese idol group HKT48
- , is a Japanese singer
- , is a Japanese YouTuber and singer
- , is a Japanese singer and songwriter
Other uses
- Aika, an ancient name of Troia (FG), Italy