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- The Pack Street Dogs - Clifford the Big Red Dog
- The Pack Rats - The Comic Strip, Street Frogs
- Pankhurst - Half Man Half Biscuit
- The Partridge Family- The Partridge Family
- Pain - CHiPs
- Pale Horse - Watchmen
- The Paranoids - Thomas Pynchon's spoof of The Beatles in The Crying of Lot 49
- Dolly Pardoner - ] April 1997 I Was Country When I Was In School Pull Out Prank CD cover
- Isabella Parigi - Lizzie McGuire The Movie
- Billy Parker - Hearts of Fire
- Jimmy Parlow - Girls Town
- Nonnie Parry - The Poseidon Adventure
- The Parson - The Simpsons
- The Party Posse - The Simpsons, "New Kids On The Blecch", parody of N*Sync
- Drake Parker and his band - Drake and Josh
- Pauper - Jem shown in magazine in "In Search of The Stolen Album"
- Patricia "Trish" Maria De La Rosa - Austin and Ally
- Del Paxton - That Thing You Do!
- Johnny Paycheckminus - ] April 1997 I Was Country When I Was In School Pull Out Prank CD cover
- Peabo "Pudge" Pudgemeyer - Cats Don't Dance
- Peach Hit 5 - Paper Mario
- Ray "Woody" Peckitt - Jem comics #6 "The Greatest Gift"
- Pee Wee - Smurfs
- Planet Piss - Metalocalypse
- Ruttling Orange Peel - The Rutles
- Penelope - Pound Puppies (TV show)
- Pentakill - League of Legends
- The Peoples - This Is Spinal Tap
- The Phantom of the Opera - The Phantom of the Opera
- The Phantomato of the Opera - Attack of the Killer Tomatoes: The Series
- The Philadelphia Phreeze-Dried Philharmonic Orchestra - Nickelodeon Magazine October 2000, Prankvertisement Musical Gadgets from No Way Novelties
- Phineas and the Ferb-Tones ("PFT") - Phineas and Ferb
- Phish Tahko - My Name Is Earl
- Phoebe and Leslie - Friends
- Phoenix - Phantom of the Paradise
- Phyllis and The Pharohs - The Electric Company
- The Phynx - The Phynx
- Ubaldo Piangi - The Phantom of the Opera
- Charlie Pig - Bonkers TV series
- Pigdonna - Piggsburg Pigs
- Piggy - Get Crazy
- Pimp Franklin - King of the Hill
- Pimply Taco Armpits - Nickelodeon Magazine October 2000, "The Return of the Band-O-Matic"
- The Pinheads - Back to the Future
- Pink - The Wall
- Pink Rhinoceros - Space Goofs
- Pink Slip - Freaky Friday
- Pit Bull Surfers - Eerie, Indiana
- The Pixie Chicks - Nickelodeon Magazine October 2000, Ruffing It Episode 34 "Revenge Is Tweet"
- Pizza Party - Foster's Home for Imaginary Friends
- Pizza Time Players - Showbiz Pizza
- The Plaids - Forever Plaid and Plaid Tidings
- Plasticine - Doctor Who: No Future and Doctor Who: Happy Endings Virgin New Adventures by Paul Cornell
- Plankton and The Patty Stealers - SpongeBob SquarePants
- Platinum Weird
- Plavalaguna - The Fifth Element
- The Pointless Sisters - Round House, parody of The Pointer Sisters
- PoP! - Music and Lyrics
- Poppelganger The Best Show on WFMU
- Powerline - A Goofy Movie
- The Potato Bug - Bikini Beach
- Prayer Bolt - Metalocalypse
- Jill Presto - Lucifer
- The Pretty Pretty Princesses - The Mighty B
- Princess Penelope - The Simpsons
- Princess Victoria Bethany Evangeline Renee - Barbie: The Princess and The Popstar
- The Prismriver Sisters (or Phantom Ensemble) - Touhou Project
- Priss and The Replicants - Bubblegum Crisis
- Professor LaPlano and The Planotones - American Hot Wax
- Protozoa- Zenon: Girl of the 21st Century
- The Problems - Light of Day
- Pudding People - This Is Spinal Tap
- Pugilism and The Third Autistic Cuckoo - "The Long Dark Teatime of the Soul" The band is only briefly mentioned, but their hit single plays a vital part in the book.
- Punk Floyd - The Rutles
- Purple Filth - Grim and Evil
- Blind Lemon Pie - The Rutles
- PMS (Paige Michalchuk and the Sex Kittens) - Degrassi: The Next Generation. There was also a real band with these initials Pre Metal Syndrome
- Purge - Gordon Korman's Born To Rock
- Psychic Ugly Mice - Nickelodeon Magazine March 1998, "The Band-O-Matic"
Read more about this topic: List Of Fictional Music Groups