1980

Television

 * The Muppet Show Season 5 begins in syndication
 * Barrio Sésamo ends its first run in Spain
 * Emmet Otter's Jug-Band Christmas first airs on network television (ABC), December 15
 * Here Come the Puppets PBS special

Appearances

 * Kermit and Miss Piggy host an episode of Great Performances featuring the San Francisco Ballet performing Cinderella on PBS

Storybooks

 * The Amazing Mumford Presents All About Bones
 * Anybody Can Play
 * Big Bird Follows the Signs
 * The Case of the Missing Duckie
 * The Count Counts a Party
 * The Count's Counting Book
 * Don't Forget the Oatmeal!
 * Down on the Farm with Grover
 * Farley Goes to the Doctor
 * Fix It, Please
 * Going Up: The Elevator Counting Book
 * Grover's Book of Cute Little Baby Animals
 * The House That Biff Built
 * I Can Do It Myself
 * If I Lived Alone
 * Look What I Found!
 * Molly Moves to Sesame Street
 * Monsters Come in Many Colors!
 * Muppets at Sea
 * Robin Hood
 * The Sesame Street Dictionary
 * The Sesame Street Pet Show
 * The Sesame Street Storybook Alphabet
 * Show and Tell
 * Special Delivery
 * Spring Cleaning
 * The Tool Box Book
 * Twiddlebugs at Work
 * Vegetable Soup
 * What Did You Bring?

Non-fiction Books

 * The Art of the Muppets
 * Sesame Street Sign Language Fun

Albums

 * Big Bird's Birdtime Stories
 * Christmas Eve on Sesame Street
 * In Harmony: A Sesame Street Record
 * Love
 * The People in Your Neighborhood

Merchandise

 * The Muppet Stuff store opens on Lexington Avenue in New York City
 * The Miss Piggy Calendar 1980
 * Picco clocks
 * The Sesame Street Calendar: The 1980 World Games
 * Sigma Christmas ornaments

Stage Shows

 * Sesame Street Live premieres with A Sesame Street Mystery: The Case of the Missing Rara Avis

Muppet Character Debuts

 * The Muppet Show: Pops, Lips, Armstrong the Chicken Hawk (prototype), Betsy Bird, various Frackles
 * Sesame Street: Forgetful Jones, Clementine, Dr. Nobel Price
 * Sesamstraat: Ieniemienie

People

 * Martin P. Robinson joins Sesame Street

Locations

 * Sesame Place amusement park opens in Langhorne, Pennsylvania