Entertainment
- Red Line 7000, a 1965 American motion picture
- Red Line (1959 film), a 1959 Finnish film
- Red Line (1996 film), an American action film
- Red Line (album), a 2000 post-rock album by Trans Am
- The Red Line, an opera by composer Aulis Sallinen which premiered in 1978
- A stretch of land that circles the globe in Oda Eiichiro's manga and anime series One Piece
- "Red Line -for TA-", a 2009 single B-side by Ayumi Hamasaki included in her "Rock 'n' Roll Circus" album.
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