Entertainment
- Niagara (1953 film), a film noir starring Marilyn Monroe
- "Niagara" (The Office), a two-part episode of the American television series The Office
- Niagara (artist), an American singer and artist
- Niagara (board game)
- Niagara (band), a French rock band
- Niagara (cinema), an old movie theater in Tehran
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