Octavia may refer to:
People
- Octavia the Elder, elder half sister of Octavia Minor
- Octavia the Younger, sister of Augustus, younger half sister of Octavia Major and fourth wife of Mark Antony
- Claudia Octavia, the daughter of Claudius and Valeria Messalina and first wife of Nero
Culture
- Octavia (play), a tragedy mistakenly attributed to the Roman playwright Seneca the Younger that dramatises Claudia Octavia's death
- Octavia (opera), by Reinhard Keiser
- Octavia, a romance by Jilly Cooper
- Octavia (TV serial), an ITV adaptation of Cooper's novel, written by Jonathan Harvey
- Octavia (She-Ra) is a character from the cartoon She-Ra: Princess of Power
- Octavia of the Julii, a character in HBO's television series Rome loosely based on Octavia Minor
- Octavia, Kielian snake in the Guardians of Ga'Hoole series. She is a nest maid for Ezylryb and Madame Plonk
Others
- Škoda Octavia is the name of small family car introduced by the Czech automobile manufacturer Škoda Auto
- Octavia Sperati, a doom metal band
- Octavia Boulevard is a street in San Francisco, California
- Octavia (Bolivian Band), a Bolivian Pop rock band
- "Octavia" is a song by Bruce Dickinson from the album Skunkworks
- 598 Octavia, an asteroid
- Octavia (effects pedal), developed by Roger Mayer
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