Muppet Wiki is a wiki "for everything related to Jim Henson, Sesame Street, and the Muppets." It is hosted by Fandom (formerly WikiCities/Wikia), which runs on (modified) MediaWiki software. This format allows visitors to add, remove, or otherwise edit and change content that has been curated through a system of checks and balances. Muppet Wiki works as a collaborative effort overseen by a team of dedicated administrators and editors working together as a community toward the creation of in-depth encyclopedic articles.
Founded on December 5, 2005 (under WikiCities), Muppet Wiki's database contains 39,717 encyclopedic articles (which does not include wiki discussions, project pages, or redirects). The logo was designed by Scott Hanson and based on a theme from the March photo in The Miss Piggy Calendar 1980. This was incorporated into a new design based on The Muppet Show logo by Julian Kleibeler in October 2010 (including seasonal flair).
Although the wiki is run in an unofficial capacity, several industry insiders have made substantial contributions, adding to the wiki's credibility (see "Mission" statement below). Their presence has been welcome in a capacity of their choosing: while some individuals have gone on record as identified experts, the anonymity of others is respected and acknowledged by the wiki hosts.
The goal of Muppet Wiki and its contributors is to build a database of articles related to Jim Henson's career and various character universes. Through the research of published works and various media content, the database is meant to serve as a comprehensive source of reference. An accurate account of works cited is provided when possible (by way of footnotes and adherence to other policies), and particular attention is given to verifiable information. Special care is taken with disputed or erroneous information, and in some cases may result in a settlement in the form of a rumor disclaimer.
Although the name of the site is Muppet Wiki, the encyclopedia extends to areas outside of what may be publicly perceived as "Muppet" content in some cases. For example, Sesame Street, while well known for its inclusion of Jim Henson's Muppets, comprises a number of different contributions such as animation and live-action film unrelated to the Muppets. Because Sesame Street and the Sesame Street Muppets are so closely associated, these areas often blend into one another, and thus, have been included in some cases. (see Muppet Wiki:Coverage)
Similarly, Jim Henson's work outside of the Muppets is also stressed, one example being technology and characters furnished by Jim Henson's Creature Shop. Of the works created by companies using material furnished by the Creature Shop, only those works produced by The Jim Henson Company are covered extensively. Other examples of non-Muppet Jim Henson content include The Cube and "Tick-Tock Sick."
- Jimmy Wales, co-founder of Wikipedia and Wikia, frequently uses Muppet Wiki as an example of how to build a successful wiki community in public lectures, seminars and interviews.
- By December 5, 2006, Muppet Wiki's one year anniversary, the database housed 1,766 Muppet Characters, 548 Sesame Street Books, and 521 Muppet Show Songs; 12,130 articles in all, averaging a thousand articles per month in one year.
- Muppet Wiki was featured in segment #4 of the August 3, 2006 broadcast of The 9 on Yahoo TV!
- The site has been mentioned in major newspaper publications such as The Boston Globe, The New York Post, Australia's The Age and Denmark's Ekstra Bladet.
- In the July 2007 print edition of reason magazine, coverage of Muppet Wiki is used as an example of Wikia's growth:
Consider, for instance, the astonishing growth and readership at the Wikia site devoted to Muppets. At a little over one year old, the Muppet Wiki has 13,700 articles. Every single one is about Muppets. Interested in an in-depth look at the use of gorilla suits in the Muppet movies? No problem. Just type in "gorilla suits" and enjoy a well-illustrated article that documents, among other things, the names of actors who have worn an ape outfit for Jim Henson. There is a timeline of all things Muppet-related. An entry on China details Big Bird's reception in the People's Republic. The site is astonishingly comprehensive and, perhaps more impressive, comprehensible to a Muppet novice.
- National Public Radio listed Muppet Wiki's Cookie Monster article as a "Web Resource" in conjunction with a featured spot on their program In Character on February 8, 2008. 
- Kermit Culture, a collection of academic essays about the Muppets in popular culture, offers Muppet Wiki as an additional resource "for fans and scholars" of The Muppet Show cast. Two essays source articles on Muppet Wiki in their works cited: "The Muppets and Shakespeare" by Hugh H. Davis (Kermit, Prince of Denmark); "The Uniquely Strong but Feminine Miss Piggy" by Maryanne Fisher and Anthony Cox (Bonnie Erickson, Miss Piggy). Additionally, Muppet Wiki administrator and regular editor since January 6, 2006, Andrew Leal, contributed "Muppets and Money."
- The National Post cited Muppet Wiki as the sole source for their 2009 interactive article "101 Muppets of Sesame Street," indicating that some journalist are using Muppet Wiki as a primary source of information.
- Muppet Wiki reached 20,000 articles on November 16, 2009.
- The official Sesame Street 40th anniversary book, Sesame Street: A Celebration - 40 Years of Life on the Street, published in 2009, cites Muppet Wiki several times as "an invaluable resource" for readers who would like to learn more about the series. Tough Pigs founder and Muppet Wiki co-founder Danny Horn is interviewed for the merchandise section, where he talks about his earliest memory of Sesame Street Merchandise.
- Sesame Workshop has a link to Muppet Wiki on its parenting blog, Sesame Family Robinson. Sesame-Street.jp has linked to articles on Muppet Wiki (including Twiddlebugs and Meryl Sheep) for further, comprehensive information on entries for their monthly character feature.
- Muppet Wiki is listed as a source in the resource materials provided at the Jim Henson's Fantastic World exhibit.
- Jim Henson: The Guy Who Played with Puppets lists Muppet Wiki as one of its website sources.
- In the audio commentary recorded for the Blu-ray release of The Muppets, director James Bobin stated that fans at Muppet Wiki and Muppet Central probably know more about the characters than the filmmakers do.
- Character images for Harvey Kneeslapper and Pedro were used in the background of the Downton Abbey parody on Sesame Street (see image). An earlier version featured the same Harvey image, as well as one of Queen Olivia, but with digital alterations. (See image here).
- Sesame Street director Nadine Zylstra mentioned the website when talking about Sesame Workshop's large audience at a Google Tech Talk in March 2013. (YouTube)
- Muppet Wiki images for certain Sesame Street segments and "Elmo's World" episodes have been used for thumbnails for videos found on SesameStreet's YouTube Channel and Sesame Go.
- At the "Second Annual Muppet Trivia Spectacular" event held at the Museum of the Moving Image by The Jim Henson Legacy in October 2015, the members of Tough Pigs faced off in a three-round game called "The Toughest Pig." The second round featured excerpts from Muppet Wiki articles (including Sam the Robot, Mr. Hooper and event co-host Stephanie D'Abruzzo) and the contestants would earn points by correctly pointing out the (newly-added) bit of incorrect information.
- Craig Shemin used Muppet Wiki's article of Gilbert Gottfried to list off his Muppet appearances in an appearance on a 2017 episode of Gilbert Gottfried's Amazing Colossal Podcast!
- During the Museum of the Moving Image's "Preserving Jim Henson's Legacy" webinar on April 25, 2020 Karen Falk gives thanks to the various companies involved in various Henson-related exhibits, as well as the Muppet fan community and "that Muppet Wiki that we all use every day." ,
- The Wiki and its Twitter account were acknowledged by the official "The Muppets" account (under the guise of being operated by Walter) in an August 2020 tweet.
- "The Muppet Wiki" is recognized in the special thanks during the credits of Street Gang: How We Got to Sesame Street.
- On November 8, 2021, the official Sesame Street Facebook and Twitter accounts posted a clip from Episode 0343. Both accounts give acknowledgement to Muppet Wiki for bringing public attention to the episode earlier in the weekend.
- Matt Vogel acknowledges the Muppet Wiki as a useful tool in researching a character's history in Episode #31 of Below the Frame (mentioned at 00:44:01).
- On April 12, 2022, the University of Maryland hosted an online event "Archiving a Legacy: A Conversation with Karen Falk of The Jim Henson Company." During a section on fan engagement, Falk mentioned the Wiki as a productive resource.
Basic Muppet Wiki logo
October 15, 2010
November 25, 2010
December 24, 2010
Valentine's Day logo
February 14, 2011
March 21, 2011
Earth Day logo
April 22, 2011
Arbor Day logo
April 29, 2011
Memorial Day logo
May 30, 2011
Independence Day logo
July 4, 2011
June 26, 2013
Labor Day logo
September 5, 2011
Muppets Now takeover logo
July 31 to September 5, 2020
October 31, 2010
December 4, 2010
Groundhog Day logo
February 2, 2011
St. Patrick's Day logo
March 17, 2011
April Fool's Day logo
April 1, 2011
April 24, 2011
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May 8, 2011
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June 17, 2011
June 19, 2021
Pride Month logo
June 20, 2022
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December 30, 2011
- nowpublic "Jimmy Wales Gives Talk on Free Culture, Transparency, and Search" Michael Meyers, 02/01/07
- net@nite Live Amber MacArthur and Leo Laporte, 02/13/07
- CNN Money "Wikipedia's next steps" David Kirkpatrick, 02/23/07
- education.au "Challenging how knowledge is created" Part 3: What is Wikia, Jimmy Wales, 04/07
- Wired "Wikipedia Is Just the Start" Dylan Tweney, 5/29/07
- O'Reilly "NFAIS Notes: Buzzwords and Bemusement" Dawn Applegate, 08/14/07
- Information World Review "Jimmy Wales on the role of Wikipedia in society" Mark Chillingworth, 12/04/07
- iMedia Connection "Why the recession won't kill digital media" Susan Kuchinskas, 03/26/09
- Mediamixx 09, June 4, 2009 via TweetsbyDesign Twitter feed:    
- Google@Youtube "Jimmy Wales at Zeitgeist '07" 08/16/07
- Esquire "10 Questions for Wikipedia's Jimmy Wales, 10 Years On" by Foster Kamer, 1/13/11
- Boston Globe "The wiki faithful look beyond encyclopedias to activism" Kim-Mai Cutler, 08/09/06
- New York Post "Chief Wiki's Ad Play" Sam Gustin, 11/16/06
- The Age "A Muppet A to Z" 8/24/08
- See talk page for a translation of the mention
- reason magazine "Wikipedia and Beyond: Jimmy Wales' sprawling vision" by Katherine Mangu-Ward 07/2007
- The National Post "101 Muppets of Sesame Street" by Steve Murray and Rebecca Yanovskaya, 2009
- sesame-street.jp "The Sesame Times", recurring
- ToughPigs forum, Peter Savieri comment, 12/07/11
- Sesame Street Facebook November 8, 2021
- Sesame Street Twitter November 8, 2021