The Central Casting section on the official Muppets site lists the following Muppets as the major characters:
Animal - Frank Oz (1975 - 1999), Eric Jacobson (2002 - )
Beaker - Richard Hunt (1977 - 1990), Steve Whitmire (1992 - )
Bobo - Bill Barretta (???? - 2006)
Clifford - Kevin Clash
Dr. Bunsen Honeydew - Dave Goelz
Dr. Teeth - Jim Henson (? - 1990), Bill Barretta (1991 - )
Sgt. Floyd Pepper - Jerry Nelson
Fozzie Bear - Frank Oz (? - 2000), Eric Jacobson (2001 - )
Gonzo - Dave Goelz
Janice - Richard Hunt (1974 - 1992), Brian Henson (1992 - )
Johnny Fiama - Bill Barretta (???? - 2006)
Kermit the Frog - Jim Henson (? - 1990), Steve Whitmire (1990 - )
Miss Piggy - Frank Oz (? - 2000), Eric Jacobson (2001 - )
Pepe the Prawn - Bill Barretta
Rizzo the Rat - Steve Whitmire
Rowlf the Dog - Jim Henson (? - 1990), Bill Barretta (1991 - )
Sam the Eagle - Frank Oz (? - 2000), Kevin Clash (2001 - 2005 ), Eric Jacobson (2005 - )
Scooter - Richard Hunt (1976 - 1990), Adam Hunt (1992 - ?) [voice only] Brian Henson (2002 - 2003), Rickey Boyd (2005 - )
Statler - Richard Hunt (? - 1992), Jerry Nelson (? - ?), Steve Whitmire (currently)
Swedish Chef - Jim Henson (? - 1990)/Frank Oz (? - 2000), Bill Barretta (1992 - )/Eric Jacobson (2001 - )
Waldorf - Jim Henson (? - 1990), Dave Goelz (1991 - )
Zoot - Dave Goelz
These Muppets were based on celebrities:
Marry Banilow, based on Barry Manilow
The Cobble Stones, based on The Rolling Stones (the Cobble Stones' lead singer, Mick Swagger, was also based the Rolling Stones' lead singer, Mick Jagger)
Cookie Monster's alter-ego Alistair Cookie, based on Alistair Cooke (SS)
Count von Count, based partly on Bela Lugosi's portrayal of Dracula (SS)
Polly Darton, based on Dolly Parton (SS)
Dr. Feel, based on Dr. Phil (SS)
Placido Flamingo, based on Plácido Domingo (SS)
Arlene Frantic, based on Arlene Francis (of "What's My Line?") (SS)
Donald Grump, based on Donald Trump (SS)
Spamela Hamderson, based on Pamela Anderson, was featured on the short-lived Muppets Tonight program
Sherlock Hemlock, based partly on Sherlock Holmes (SS)
Joe Hundred Guy, based on Joe Millionaire (SS)
An Anything Muppet based on Kate Pierson of The B-52's (SS)
Ethel Mermaid, based on Ethel Merman (SS)
Kiefer Sutherland Muppet, based on Kiefer Sutherland, in a 24 parody
H. Ross Parrot, based on H. Ross Perot (SS)
Pat Playjacks, based on Pat Sajak (SS)
Barbara Plum, based on Barbara Frum (Sesame Park (Canadian))
The Sesame Street Beetles, based on the Beatles (SS)
Meryl Sheep, based on Meryl Streep (SS)
The Benedictine Monkees, based on The Monkees (Muppets Tonight)
Bennett Snerf, based on Bennett Cerf (of "What's My Line?") (SS)
Bruce Stringbean, based on Bruce Springsteen (SS)
Johnny Trash, based on Johnny Cash (SS)
Trianglebob Trianglepants, based on Spongebob Squarepants (SS)
Vincent Twice Vincent Twice, based on Vincent Price (SS)
Babwa Wawa, based on Barbara Walters (SS)
Nine Inch Snails, based on Nine Inch Nails
Dr. Teeth, based on Dr. John
Janice, based on Janis Joplin and Mick Jagger
Sgt. Floyd Pepper, based on The Beatles' Sgt. Pepper's Lonely Hearts Club Band, and Pink Floyd
Lewis Kazagger, based on Howard Cosell, of ABC's Wide World of Sports
Flo Bear, a bear who writes fiction, named for French author Gustave Flaubert
Other notable characters include:
Crazy Harry - Jerry Nelson
Lew Zealand - Jerry Nelson
Link Hogthrob - Jim Henson (? - 1990) (character has been semi-retired since Henson's death)
Marvin Suggs - Frank Oz (? - 2000) (character has been semi-retired)
Robin - Jerry Nelson
Sweetums - Jerry Nelson (? - ?) Richard Hunt (? - 1992), John Henson (1993 - )
These were the Muppets from the "Muppet Show"
Animal : WO-MAN!!
Annie Sue : Miss Piggy's disciple and rival (3rd season)
Beaker : Bunsen Honeydew's Assistant
Beauregard : Janitor (later seasons)
Betsy Bird : Built as a showcase for dancer Betsy Baytos
Big Mama : Orange monster with big mouth and ears
Bobby Benson : Director of the Baby Band
Boppity : Blue monster with big ears and beak
Camilla the Chicken : Gonzo's main squeeze
Crazy Harry : Likes explosions
Dr. Bunson Honeydew : Scientist-type
Dr. Julius Strangepork : Science officer on the Swinetrek
Droop : Fuzzy guy with long snout (see Ben Vereen ep.)
Fletcherbird : Showcase for dancer Graham Fletcher (see Leo Sayer)
Flying Zucchini Brothers : Human Cannonball act
Foo-foo : Miss Piggy's dog
Fozzie Bear : "The comedian's a bear!"
Gaffer : Piratical-looking cat, mostly just lay backstage
George the Janitor : Janitor (early seasons)
Gladys : Cafeteria Waitress (see Gene Stapleton ep.)
Gloat : Light green monster with two fangs (see Joel Grey)
The Great Gonzo : Claims he's a "whatever"
Hilda : From wardrobe (1st season)
J.P. Gross : Scooter's uncle who owns the theatre
Kermit : The Main Frog
Lew Zealand : Throws fish
Lewis Kezagger : Sportscaster
Link Hogthrob : Captain of the Swinetrek
Marvin Suggs and his
Amazing Muppephone : Also, MS and his All-Food Glee Club
Mildred : George's purple dancing partner
Miss Kitty : Purple monster with blue nose (see Juliet Prowse)
Miss Piggy : The Main Pig
Muppy : White dog (first season)
Mutations : Dancing Pink Monsters
The Newsman : News Anchorman (yes, that's his name)
Nigel the conductor : Wrote theme music
Pops : Greeted guest stars at show opening (5th season)
Rizzo : One of the rat pack
Robin : Kermit's nephew
Rowlf : Piano-playing dog
Sam the American Eagle : Tried to uphold "decency" on the show
Scooter : The gofer (stage assistant)
Louis Kazagger : Sports anouncer
Scoffs : Monsters with long necks and beaks (early seasons)
Statler : Heckler -- the thinner guy in the balcony
Swedish Chef : The cook -- Bork bork bork!
Sweetums : Big ol' monster
Thog : Large blue monster with ears that go up
Timmy Monster : Large blue monster with green lips
Tom, Dick, and Harry : The 3-headed creature
Uncle Deadly : Phantom of the Muppet Show; scary looking
Vendaface : Facelift machine
Virginia : One of the Muppaphones
Waldorf : Heckler -- the wider guy in the balcony
Wayne and Wanda : Upstanding "churchgoing" couple (1st season)
Dr. Teeth and the Electric Mayhem
Dr. Teeth -- keyboards
Sgt. Floyd Pepper -- guitar
Zoot -- saxophone
Janice -- guitar, vocals
Animal -- drums
Lips -- trumpet (later)
Veterinarian's Hospital
Dr. Bob (Rowlf)
Nurse Piggy
Nurse Janice
Pigs in Space
The Swinetrek
Captain Link Hogthrob
Dr. Julius Strangepork
First Mate Piggy
(Some) Special Muppet Guests
Alfredo : Mop dancer (Liberace ep.)
Alexander Beetle : Blue beetle (Debbie Harry ep.)
Ali Baba : Marty Feldman lookalike (Marty Feldman ep.)
Alice Cooper Band : Band members (Alice Cooper ep.)
Andre the Artist :
Angus McGonagle : The Gargling Gargoyle ("Star Wars" ep.)
Astoria : Waldorf's wife (Dizzy Gillespie ep.)
Auntie Melba's Cow Chorus : Sang "We've got Elegance" (Arlo Guthrie ep.)
Automatic Wastebasket : Eats trash and Beaker (Bob Hope ep.)
Baskerville the Hound : Auditions for show (Steve Martin ep.)
Beautiful Day Monster : "Got anything cheaper?" (Paul Williams ep.)
Beaver : Made Gonzo fall off a wooden pole (Julie Andrews)
Behemoth : "I've got you, under my skin..." (Vincent Price)
Bernie the Easterbunny : Makeup man (Valerie Harper ep.)
Bert : Old singing guy (Don Knotts ep., Nancy Walker ep.)
Bert and Ernie : Sesame Stree Muppets (Connie Stevens ep.)
Big Bird : Sesame Stree Muppet (Leslie Uggams ep.)
Big V : Eats Lenny the Lizard (Rich Little ep.)
Billy the Bear : Comedian (Phyllis George ep.)
Bouncing Borcelino
Brothers : Acrobat pigs (Florence Henderson ep.)
Bruce : Little fox in "At the Dance" (Connie Stevens ep.)
Bullets Barker : Bad cowboy (Roy ROgers ep., Dale Evans ep.)
Bun-Bun brothers : (Alan Arkin ep.)
Buste of Beethoven : Music critic (James Coco ep., Cheryl Ladd ep.)
Butch and Sundance : (Jonathan Winters ep.)
Carrie Lousie and friend : Girl & frog who audition for the show (Steve Martin)
Chopped Liver Alien : From Pigs in Space (Cloris Leachman ep.)
Chris Rudolph : And his invisible cheeseburger (Gene Kelley ep.)
Clive Cahuenga :Singing civil servant (Danny Kaye ep.)
Clodhoppers : Dancing monsters (Valerie Harper ep.)
Cookie Monster : Matches Marty's eyes (Marty Feldman ep.)
Crocodile : Eats frogs (Sandy Duncan ep.)
Cynthia Birdley : Strange women on panel (Peter Ustinov ep.)
Danceros : Big dancing thing (Jim Nabors ep.)
The Dancing Spunches : Clean up water acts (James Coco ep.)
Dirth Nader : (Crystal Gale, "Star Wars" eps.)
Doglion : Beast in Beauty and the Beast (Leslie Ann Warren)
Dr. Pig (Dr. Bob as a pig): "Vegetarian Hospital" (Cloris Leachman ep.)
Dr. Watson : In Sherlock Holmes sketch (Joel Grey ep.)
Eric : Parrot in penguin suit (Glenda Jackson ep.)
Falling Alfonsos : Did the 150 feet dive (Phyllis George ep.)
Fieldling : Butler from Sherlock Holmes sketch (Joel Grey ep.)
Fleet Scribbler : Tabloid reporter (George Burns ep.)
Flo the Chicken : From "At the Dance" (Lou Rawls ep.)
Fozzie Pig : When the pigs take over the show (Cloris Leachman)
Four Fazoobs : Singing Koozbanian creatures (Steve Martin ep.)
The Gawky Birds : Big pink birds (Bruce Forsyth ep., Liberace ep.)
George : Koozbanian rock (Elke Sommer ep.)
Gerry and the Atrics : Band of old muppets (Dyan Cannon ep.)
Giant Chicken : Thorws man into the birdcage (Nancy Walker ep.)
Goldilocks : Tells Ali Baba where her bears are (Marty Feldman)
Gorgon Heap : One of world's greatest eaters (Vincent Price ep.)
Gogolala Jubilee Jugband : The first Muppet Jug band (Ruth Buzzi ep.)
Gorilla : Destroy's Bunsen's laboratory (Avery Schreiber)
Grease Slimy : Wig racer (Marissa Berenson ep.)
Granny the Goucher : Lady wrestler (Zero Mostel ep.)
Harold : Woodpecker in "At the Dance" (Petula Clarke ep.)
Herman : Dancing partner of shouting lady (Phyllis Diller)
Hugga Wugga Alien : "You are my sunshine..." (Phyllis Diller ep.)
Hildegarde : Mop dancer (Liberace ep.)
Inspector La Brea : Noise inspector (Dizzy Gillespie ep.)
Java Tube Muppets : Dancing things (Ethel Merman ep.)
Julie Andrews's Cow : Hangs around backstage (Julie Andrews ep.)
Kermit the Pig : When the pigs take over the show (Cloris Leachman)
Koozbanian Foob : Tasty, fast-evolving creature (Judy Collins ep.)
Koozbanian Spoobol : All-liquid alien (John Cleese ep.)
Laticia : Female rhinoceros (Jean Stapleton ep.)
Lenny the Lizard : Auduitions for part of Emcee (Steve Martin ep.)
Leslie and Warren : Dancing cucumbers (Leslie Ann Warren ep.)
Lolita : Gonzo's dancing chicken (Rich Little ep.)
Lollup Lou : And the Jughuggers (Gene Kelly ep.)
Long-Legged Giant Spider : In "Someone Just Like You" (Raquel Welch ep.)
Luis Greco : Morse code flamenco dancer (Spike Milligan ep.)
Luncheon Counter Monster : Eats everything (Nancy Walker ep.)
Lydia : The tattoed lady (Connie Stevens ep.)
Mahna mahna : Eyes matched snowths' mouths (Juliet Prowse ep.)
Martha : Koozbanian Rock (Elke Sommer ep.)
Marvin : Guy from "At the Dance" (Julie Andrews ep.)
Mary Louise : Kermit's dancing partner (Twiggy ep.)
Melissa : And her magnetic moose (Chris Langham ep.)
Merdlelidop Aliens : Inhabitants of Koozbain (Dom DeLuise ep.)
Mickey Moose : Hnags around backstage (Petula Clarke ep.)
Miss Mousey : Miss Piggy's rival (Bernadette Peters ep.)
Momma : Music machine (Dudley Moore ep.)
Mortimer Snerd : (Edgar Bergen ep.)
Mrs. Appleby : Leader of Robin's scout troop (Debbie Harry ep.)
Mrs. Wilson : Female reporter (Rich Little ep.)
Mulch : Hunchback-type monster (Debbie Harry ep.)
The Newspig : When the pigs take over the show (Cloris Leachman)
Old Skyball Paint : Most dangerous horse in the West (Roy Rogers ep.)
Orange Horse : In cowboy sketch (Bob Hope ep.)
Peg Legg : Pretty good dancing pirate (Glenda Jackson ep.)
Phillys : Creature with balloon nose (Petula Clarke ep.)
Pierre Lacouse : One of world's greatest chefs (Vincent Price ep.)
Prof. Albert Flan &
Otto the Robot Comedian: (Sylvester Stallone ep.)
Roger : Works at Muppet Sound Studio (Helen Reddy ep.)
Ronald Duck : Mickey Moose's friend (Petula Clarke ep.)
Scoffs : Monsters with long necks and beaks (early seasons)
Seven Foot Talking Carrot : Operetta singer (Gilda Radner ep.)
Seymour : Boomerang fish (Marissa Berenson ep.)
Shakey Sanchez : And his bomb balancing act (Glenda Jackson ep.)
Singing Fireman : Auditioned while there's a fire (Roy Clark ep.)
Snowths : Pink yello-lipped creatures (Juliet Prowse ep.)
Snurbs (Snerfs?) : Creatures with trumpets on noses (Bruce Forsyth ep.)
Sopwitch : Camel (Helen Reddy ep.)
Svengali : Did something to pink creature (Peter Ustinov ep.)
Swedish Chef Pig : When the pigs take over the show (Cloris Leachman)
Sweetums Pig : When the pigs take over the show (Cloris Leachman)
Thudge Mc Gerk : Spooks around theaters (Vincent Price ep.)
Tom, Dick, and Harry : The 3-headed creature
Trevor the Gross : Gonzo replacement (Lola Falana ep.)
Vendawish : Wish granting machine (Leslie Uggams ep.)
William Tell : Shoots arrow everywhere (Alice Cooper ep.)
Willy : Pig (Gilda Radner ep.)
Winky Pinkerton : Penguin who does bird impressions (Loretta Lynn ep.)
Yolanda : Gonzo's Dancing Cheese (Steve Martin ep.)
Yorick : The skull (Christopher Reeve ep.)
Zelda Rose : And her singing owl (Milton Berle ep.)
"Muppets Tonight" Muppets:
Recurring characters
Andy and Randy Pig : Piggy's dumb nephews
Announcer : Red bird creature
Beaker : Still Bunsen Honeydew's foil
Bill the Bubble Guy : "Bubbles come out of my head!"
Bunsen Honeydew : Competes with Van Neuter for Mad Scientist attention
Bobo Bear : Security bear
Carl : The Big Mean Bagpipe Eater/Bunny/Ventriloquist
Carter : Mr. Pudman's butler
Clifford : Dreadlock Muppet, host of the new show
Clueless Morgan : Goat, works in a cafe with Polly
Ernest Spleth : Does "Wallstreet Happenings" and other dull things
Gonzo : More masochistic than in his "Muppet Show" days
Johnny Fiama : Singer
Jowls : Guitar player in the new band
Kermit the Frog : Executive Producer
Mama Fiama : Johnny Fiama's mom
Miss Piggy : Back from a stint doing infomercials
Mr. Callahan : Polly & Clueless' customer, only hands are shown
Mr. Poodlepants : Weird clown-like character with a tongue
Mr. Pudman : Very fat and rich pig
Nigel : Green little nervous creature in control room
Pepe : The Prawn Elevator Operator
Polly Lobster : Works in a cafe with Clueless Morgan
Sal the Monkey : Johnny Fiama's monkey bodyguard
Seymour : The Elephant Elevator Operator
Snooky Bloir : Gameshow host from "Swift Wits"
Zippity-Zap : Green hip Muppet
Deep Dish Nine
Captain Peejay -- Bald captain
Craniac -- Science officer (brain creature)
Miss Piggy
Bay of Pigs Watch
David Hoggselhoff -- Champ Schwimmer
Spamela Hamderson -- Busty pig
Andy and Randy Pig
Tales from the Vet
Dr. Phil Van Neuter -- Friendly veterinarian host
Mulch -- Van Neuter's Frankenstein-like assistant
Great Moments in Elvis History
The Elvisses -- There are three of them
(Some) Special Muppet Guests
Al : Computer from "Pigs in Space" (Jason Alexander ep.)
Al : Police officer in "Fairyland PD" (Whoopi Goldberg ep.)
Arthur Model : Played for Rufus in "Swift Wits" (Pierce Brosnan ep.)
Baby Elaine : "Seinfeld Babies" (Sandra Bullock ep.)
Baby George : "Seinfeld Babies" (Sandra Bullock ep.)
Baby Kramer : "Seinfeld Babies" (Sandra Bullock ep.)
Baby Jerry : "Seinfeld Babies" (Sandra Bullock ep.)
Ben Franklin : "Great Moments in Elvis History" (Michelle Pfieffer ep.)
Bill's Bubble Family : "While You Were Slapping" (Sandra Bullock ep.)
Blowfish : Crook from casino sketch (Pierce Brosnan ep.)
Bud : "Flippers" (Martin Short ep.)
Bug Lou Allan : Hosted "People's Court" (Whoopi Goldberg ep.)
Buster Birdman : Played for Winky in "Swift Wits" (Cindy Crawford ep.)
The Captain's Log : From "Pigs in Space" (Garth Brooks ep.)
Chester Tomwater : Gave clues for Martha in "Swift Wits" (Martin Short ep.)
Clarissa : Johnny Fiama sang a love song to her (John Goodman ep.)
Colbax Birdman : Played for Winky in "Swift Wits" (Cindy Crawford ep.)
Composta Heap : Mulch's sister & Van Neuter's wife (John Goodman ep.)
Cupid : Made Bobo fall for Cindy Crawford (Cindy Crawford ep.)
Dancelot : From "Great Moments in Elvis History" (Tony Bennet ep.)
The Dancing Cheeses : Melted under the studio lights (Michelle Pfieffer ep.)
The Dancing Grannies : Something to keep the audience busy (Pierce Brosnan ep.)
Don the Prop Guy : A blood-sucking bass-kisser (Tony Bennet ep.)
The Emperor : Showed new clothes in "Fairyland PD" (Heather Locklear ep.)
Filo Sobfinger : Played for Sterling in "Swift Wits" (Michelle Pfieffer ep.)
Frankie Yakovic : And his Polka Dots (Sandra Bullock ep.)
Goldy Locks : "Fairyland PD" crook (Whoopi Goldberg ep.)
The Head of Network : Gave time slot to Bill the Bubble Guy (Garth Brooks ep.)
Humpty Dumpty : Jumped off a roof in "Fairyland PD" (Jason Alexander ep.)
The Ice Station Zebra : "Freezing my stripes off!" (Heather Locklear ep.)
Indiana : Rat from "The Rat Patrol" (John Goodman ep.)
The Irish Rodents : Sang a funny song about cheese (Cindy Crawford ep.)
Jennifer : From "Kermit the Frog Club" (Cindy Crawford ep.)
L. Ron : From "Kermit the Frog Club" (Cindy Crawford ep.)
Lancelot : From "Great Moments in Elvis History" (Tony Bennet ep.)
Laughalot : From "Great Moments in Elvis History" (Tony Bennet ep.)
Little Miss Muffet : From "Fairyland PD" (John Goodman ep.)
M! D Bolo : From "Kermit the Frog Club" (Cindy Crawford ep.)
Madeline : Wardrobe lady (Jason Alexander ep.)
Martha : Mole from "Swift Wits" (Martin Short ep.)
Moby : Ed Grimley's gold fish (Martin Short ep.)
Mt. Rushmore : Watch Gonzo as he comes flying by (Tony Bennet ep.)
The Network Censor : From "NYPD Green" (Tony Bennet ep.)
Newt : From "Kermit the Frog Club" (Cindy Crawford ep.)
Persy : Pig who loved ham, "Tales from the Vet" (Heather Locklear ep.)
The Reggae Rodents : Sang "No Woman No Cry" (Whoopi Goldberg ep.)
The Rock Lobsters : Took over the studio (Pierce Brosnan ep.)
Queen Guinevere : From "Great Moments in Elvis History" (Tony Bennet ep.)
Robbie (Meathead) : From "Kermit the Frog Club" (Cindy Crawford ep.)
Rob Reiner : From "When Harry Met Sally" (Billy Crystal ep.)
Rufus : Hound from "Swift Wits" (Pierce Brosnan ep.)
Sergio : Creature in Polly's "Sergio Surprise" (Tony Bennet ep.)
Sid Knishes : And his Mashing Patatoes (Sandra Bullock ep.)
Snerfs : Creatures with trumpets in noses (Bruce Forsyth, etc.)
Spider : Stole curts & whey in "Fairyland PD" (John Goodman ep.)
Squish : Slimy scuzzball from "NYPD Green" (Tony Bennet ep.)
Sterling : Poodle in "Swift Wits" (Michelle Pfieffer ep.)
Steve : Coffee shop customer (Heather Locklear ep.)
Stu : From "Kermit the Frog Club" (Cindy Crawford ep.)
Taylor the Turkey : Loved Thanksgiving,"Tales from the Vet" (Garth Brooks ep.)
Theresa : Coffee shop bar keeper (Heather Locklear ep.)
Thor : From "Thor, God of Thunder" (Jason Alexander ep.)
Toshi : From "Kermit the Frog Club" (Cindy Crawford ep.)
The Two-Headed Comic : Were found near nuclear power radiator (Martin Short ep.)
Winky : Beaver from "Swift Wits" (Cindy Crawford ep.)
Zeus : From "Thor, God of Thunder" (Jason Alexander ep.)
"Saturday Night Live" Muppets: (the 1st series did have Muppets in it, but these remain the characters)
King Ploobis : King of the Land of Gorch (Jim Henson)
The Mighty Favog : Ploobis's talking statue (Frank Oz)
Queen Peuta : Ploobis's wife; looks like Mildred (Alice Tweedy)
Scred : Ploobis's servent; sounds like Crazy Harry (Jerry Nelson)
Vazh : Janice Lookalike (Fran Brill)
Wisss : Ploobi's son (Richard Hunt)
"Sesame Street" Muppets:
Alice Snuffleupagus : Aloysius Snuffleupagus's sister; she's 2
Aloysius Snuffleupagus : Used to be invisible, but no more; he's 4
Alphabet Explorer : Steve Irwin look-alike
Amazing Mumford : Magician -- "a la peanut butter sandwiches!"
Angry Guy : Sherlock Hemlock lookalike
Assorted Cows : Often used a backup singers
Athena : Hoots's grandson
Baabaa Walters : A sheep
Baby Bear : From the Goldilocks tale
Baby Martian :
Baby Natasha : Infant daughter of Ingrid and Humphrey
Barkley : Large dog: owned by Linda
Bart : Bert's brother
The Beetles : They sing "Letter B"
Benny Rabbit : Bellhop at Furry Arms; don't call him a bunny!
Bert : Pigeons and Paper clips
Betty Lou :
Biff : Construction worker: partner of Sully
Big Bird : He used to be 3 but is now 6, bday on 20 Mar
Bo Peep : Keeps losing her sheep
Boss : Lefty's boss with the Golden "An"
Brad : Bert's nephew
Bruce Stringbean and the
S Street Band : "Born to Add"
Bruno : Carries Oscar's can
Buster : Forgetful Jones' horse
Captain Vegetable : Rabbit superhero
Charlie : as in "Hey, Charlie, a number 4!"
Chicago the Lion : Early SS, "I'm a veg-a-table lion"
Chrissy and the Alphabets : several big hits!
Chickens that Quack Like Ducks : How you know a herrican's on the way...
Cinderella :
Clementine : Forgetful Jones' girlfriend
Cookie Monster : Also hosts Monsterpiece Theatre
The Count von Count : Based (loosely!) on Count Dracula
The Countess Dahling von Dahling: The Count's girlfriend
The Countess von Backwards : The Count's other girlfriend(?)
Davy Monkey : One of the monkey twins; BA-NANAS!
Deena & Pearl : Monsters who loved to imagine? (old)
The Dingers :
Don Music : Can't ever get the words to rhyme
Dr. Noble Price : Scientist
Elizabeth : Green Muppet girl, owns Little Murray Sparkles
Elefante : Dancing elephant who can break evil spells
Elmo : Awww, he's so cute! He's 2 1/2, bday on 3 Feb
Ernestine : Ernie's niece
Ernie : Rubber Duckie
Farley : Little boy
Felix : Grouch that cleaned Oscar's place
Ferlengheti : Beat Poet
Flo Bear : Writer
Fluffy : Oscar's pet elephant (just the trunk)
Forgetful Jones : Cowboy; lives up to name
Frank and Stein : Two-headed monster, maybe (see Horn...)
Frazzle : Orange with horns and a big tongue; only growls
George : Elmo's dad
Gina : Muppet; "Gina play"
Gladys : Cow. A different Gladys is Elmo's mom
Granny Bird : Big Bird's Grandma
Granny Fanny Nesselrode : General-purpose old lady (Mother Hubbard, etc)
Grover : Plays SuperGrover and a waiter, he's about 4
Grover's Mommy :
Grungetta : Oscar's girlfriend
Guy Smiley : Real name: Bernie Liederkrantz
Hard Head Harry Harris : Early SS; round head, always acted up in school
Harvey Kneeslapper : Practical joker
Henry and Liza : You see, there's a hole in the bucket...
Henry Wadsworth Wrongfellow : Grouchy poet
Herbert Birdsfoot :
Herry Monster :
The Honkers :
Hoots the Owl : Plays saxophone, often at Birdland
Horn and Hardark : Two-headed monster, maybe (see Frank...)
How Now Brown Cow
and The Moo Wave : Cow singing group
Humpty Dumpty : News Flash! star
Ingrid and Humphrey : Own the hotel The Furry Arms; daughter Natasha
Irvine : Oscar the Grouch's niece
Jackman Wolf : Guy with yellow hair and glasses, sung
Jacket Fairy : Brought Zoe's jacket to life
Joey Monkey : One of the monkey twins; BA-NANAS!
Kermit the Frog : Reporter for Sesame Street News
Large Blue Wolf : In most scenes with the wolf
Lefty : Shady guy: sells things to Ernie
Little Bird :
Little Jerry and the Monotones : "Telephone Rock"
Little Murray Sparkles : Elizabeth's cat; originally named Sparkles
Little Purple Bird : Lost from Paraguay
Little Red Riding Hood : Red is liberated or non-traditional
Lord Chatterly : Guy from Alphabet Chat
Lulu : Cookie Monster's (ex?) girlfriend
Malard Duck : Helped babysit Natasha one time
Martians : The folks at CTW call them the "Yip-yips"
Merryl Sheep : Overly dramatic actress
Miss Muffett : News Flash! star
Mr. Johnson : Blue-headed guy at Grover's restaurants
Mrs. Snuffleupagus : Aloysius (and Alice) S's mother
Old MacDonald : Had a Farm
Oinker Sisters : Pointer Sisters takeoff: three singing pigs
Oscar the Grouch : First season he was orange!
Oscar's little niece :
Oscar's mommy :
H. Ross Parrot :
Papa Bear : Baby Bear's father and hero
Pat Playjacks : America's _Second_ Favorite Game Show Host
Peter Piper :
Pied Piper : Really groovy, looked like Jim Henson
Placido Flamingo : Opera singer
Polly Darton : Country Singer
Prarie Dawn : Level-headed, intelligent
Prince Charming : Threw flowers
Purple Guy : In the skit with the guy with long nose
Roosevelt Franklin : Early SS; hip young muppet with a 'fro
Rosita, Monstrua de las Cuevas : Young Hispanic muppet ("Monster of the Caves")
Rumpelstiltskin : First name is Bruce
Sam the Robot : Early SS only
Sammy : The snake
Shaggy Singer and 2 backups : Sing "Near, Far" and "Ball Tall Fall Wall"
Sheep that Do the Cha Cha : Another way to know a herrican's on the way
Sheldon the Turtle :
Sherlock Hemlock : The World's Greatest Detective
Showered Rosell : Sports Announcer
Simon the Soundman : Made noises with his mouth
Singing pigs :
Sinister Sam : "I wanna know who bought the last box
of crayons and Y"
Sleeping Beauty :
Slimey : Oscar's pet worm
Small Green Wolf : Accused of a crime
Small Lavender Wolf : Inspected Big Bird's nest after a hurricane
Snooky : Same as Snooky Bloir?
Solid Citizen : Lady on stage with Mumford
Spider of Miss Muffett : News Flash! star
Sully : Construction worker; Biff's partner
Telly Monster : "Intense and earnest"
Theodore : In the Count's classroom
The Three Little Pigs : Various skits
Twiddle Bugs : At least four; live in Ernie's flowerbox
Velma Blank : Vanna White lookalike
Very Large Grayish-Blue Wolf : Blew Kermit off the screen and screen white
Vincent Twice, Vincent Twice : Armchair announcer
Virginia the Wolf : Writer
Warren Wolf : Wolf version of Kermit the Frog
Witches in a cave : They COOPERATED to make some chicken soup
Zoe : Elmo's best friend
ZZ Top Lookalikes
There are also some Sesame Street Muppets that are found out side of the US. The second website has a list of these.
The Kermitage website www.kermitage.com is a great reference and has an alphabetical listing of the Muppets, a picture of them and a short description.
Hope this helps