Jeff Dunham (born 1962 in Dallas, Texas) is an American ventriloquist and stand-up comedian who has also appeared on numerous television shows, including Star Search, Late Show with David Letterman, Comedy Central Presents, The Tonight Show and Sonny With a Chance. He is familiar to Comedy Central audiences for his three specials on that network: Jeff Dunham: Arguing with Myself, Jeff Dunham: Spark of Insanity, and Jeff Dunham's Very Special Christmas Special. Dunham also starred in The Jeff Dunham Show for one season on the network in 2009. His style has been described as "a dressed-down, more digestible version of Don Rickles with multiple personality disorder". Describing his characters, Time observes, "All of them are politically incorrect, gratuitously insulting and ill tempered." Dunham has been credited with reviving ventriloquism, and doing more to promote the art form than anyone since Edgar Bergen.

Dunham has been called "America's favorite comedian" by Slate.com, and according to the concert industry publication Pollstar, he is the top-grossing standup act in North America, and is among the most successful acts in Europe as well. As of March 2009, he has sold over four million DVDs, an additional 7 million dollars in merchandise sales, and received more than 350 million hits on YouTube (his introduction of Achmed the Dead Terrorist in Spark of Insanity is the ninth most watched YouTube video ever), making him one of the most-viewed entertainers of all time. Spark of Insanity received the best reviews of any DVD on Amazon.com in 2008, and A Very Special Christmas Special was the most-watched telecast in Comedy Central history, with its DVD going quadruple platinum (selling over 400,000) in its first two weeks. Forbes.com ranked Dunham as the third highest paid comedian in the United States behind Jerry Seinfeld and Chris Rock, and reported that he was one of the highest earning comics from June 2008 to June 2009, earning approximately $30 million during that period.

Dunham began performing for audiences as a teenager, in various venues such as school, church, and during his job at Six Flags. By his middle school years, he began to perform for banquets attended by local celebrities such as Dallas Cowboys quarterback Roger Staubach, having developed his style of lampooning those he performed for, using the puppets to say things too risque for him to say without them.

Dunham's earliest television exposure was doing commercials for Datsun dealerships while in high school. During this period he became so associated with his craft that he and one of his dummies "cowrote" a column in the school paper, and he would pose with his dummies for yearbooks. In college, he flew around the country on weekends to perform private shows for customers such as General Electric, whose CEO, Jack Welch, he mocked during his routine. After graduating from Baylor University in Waco, Texas in 1986, he moved to Los Angeles, California, never having, as he has commented, "a real job."

Dunham appeared in the Broadway show Sugar Babies with Mickey Rooney and Ann Miller in 1985, and at the Westbury Music Fair on Long Island. These early experiences, in which he used characters like José Jalapeño on a Stick, taught him the value of modifying his act regionally, as the jalapeño jokes that worked well in Texas were not as well received by audiences in Long Island.

Dunham made his debut on The Tonight Show with Johnny Carson in 1990. At the end of his act, he was invited to sit on Johnny Carson’s couch, considered a mark of approval. At the time, Dunham saw this as his big break, though he would toil in obscurity for another twelve years, continuing his stand up at venues such as The Improv chain, and appearing in small roles on TV. One of these was such as a 1996 episode of Ellen, in which he appeared with the character of Walter, whom he had begun using around this time. Dunham also appeared with Walter in a TV commercial for Hertz. His other appearances include 60 Minutes II, Fox Sports Net's The Best Damn Sports Show Period, Hollywood Squares, Entertainment Tonight, Good Morning America and the WB's Blue Collar TV.

On July 18, 2003, Dunham's appeared on Comedy Central Presents, his first solo appearance on Comedy Central. During his half hour piece, he showcased José Jalapeño on a Stick, Walter, an early version of Melvin the Superhero Guy and Peanut, whom Dunham had begun to merchandise into a line of dolls. The appearance was successful, but Comedy Central resisted giving Dunham more airtime, feeling that he was not a good fit for them. Dunham’s manager, Judi Brown-Marmel, lobbied the network, pointing to Dunham's drawing power and merchandising profits, and arguing that the network needed more diverse content. Surprised by the high ratings of the first Blue Collar Comics concert movie that same year, the network began to reconsider its brand. In 2006, it gave Dunham his first one hour special, Jeff Dunham: Arguing with Myself, which was taped in Santa Ana, California, and drew two million viewers when it aired, cementing Dunham's stardom. His second special, Jeff Dunham: Spark of Insanity, was taped at the Warner Theater in Washington, D.C. in 2007. It was available at Redbox stands and on DVD in September 2007. Jeff Dunham's Very Special Christmas Special was taped at the Pabst Theater in Milwaukee, Wisconsin in 2008, and premiered on Comedy Central on November 16, 2008, watched by 6.6 million people. It became available on DVD and Blu-Ray on November 18, 2008. The special's premiere was the highest rated telecast in Comedy Central's history.

Dunham appeared as "The Amazing Ken" with José Jalapeño on a Stick in the 2007 Larry the Cable Guy movie Delta Farce.

In addition to these specials, Dunham also released his first music album, Don't Come Home for Christmas, on November 4, 2008. It contains original Christmas songs as well as a parody of "Jingle Bells" by Achmed entitled "Jingle Bombs". All the songs, with the exception of "Jingle Bombs", were written and accompanied by Brian Haner, who has joined Dunham's act as "Guitar Guy". His first onscreen appearance was in Jeff Dunham's Very Special Christmas Special.

In March 2009, Dunham signed a multi-platform deal with Comedy Central. It included a fourth stand-up special to air in 2010, DVDs, a consumer products partnership, a 60-city tour beginning in September 2010, and an order for a television series called The Jeff Dunham Show that premiered on October 22, 2009. Despite having the most-watched premiere in Comedy Central history, and higher average ratings than other shows on that network, the show was canceled after only one season, amid poor reviews and higher production costs than other Comedy Central shows.

Dunham appeared in a guest role with Bubba J on NBC's sictom 30 Rock, playing a ventriloquist named Rick Wayne and his dummy Pumpkin from Stone Mountain, Georgia. In November 2009 Dunham also appeared with Walter in "Hart to Hart", an episode of the Disney Channel series Sonny With a Chance, as two security guards.