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- I Can't Believe It's Not Focus! - Half Man Half Biscuit
- I Dream of Wires - spoof romo band mentioned regularly in the New Musical Express during the 1990s.
- I. Shreek - Nickelodeon Magazine June/July 1999 "Tune In To The Flipper Family", Thursday Night At The Opera
- The Imperfect Duplicates - Top 10
- The Impossibles - The Impossibles, (Hanna-Barbara cartoon series)
- In Tempo - Murder, She Wrote
- Incest Insync - The Soup
- The Indigo-Go's - The Legend of Zelda: Majora's Mask
- Indomitable Spirit - Mr. Show
- Infant Sorrow - Forgetting Sarah Marshall / Get Him To The Greek
- Insanity (later Suck, The Whom, Lead Balloon, The Surreptitious Fabric and the Blots) - Soul Music
- Inside Looking Out - MadTV
- The Integritones - The Mighty B!
- I.R.S - Ugly Betty
- Iris Anderson - Perry Mason, "The Case of the Lucky Loser"
- Iron Fading - Jem, shown in magazine in "In Search of the Stolen Album"
- Iron Weasel - I'm in the Band
- Irwina Allen - Chip 'n Dale Rescue Rangers
- Itchy Koalas - Round House
- Ivan and the Terribles - Motel Hell
Read more about this topic: List Of Fictional Music Groups