George Louis Costanza is a character in the American television

Television program

A television program , also called television show, is a segment of content which is intended to be broadcast on television. It may be a one-time production or part of a periodically recurring series...

 sitcom

Situation comedy

A situation comedy, often shortened to sitcom, is a genre of comedy that features characters sharing the same common environment, such as a home or workplace, accompanied with jokes as part of the dialogue...

 Seinfeld

Seinfeld

Seinfeld is an American television sitcom that originally aired on NBC from July 5, 1989, to May 14, 1998, lasting nine seasons, and is now in syndication. It was created by Larry David and Jerry Seinfeld, the latter starring as a fictionalized version of himself...

(1989–1998), played by Jason Alexander

Jason Alexander

Jay Scott Greenspan , better known by his professional name of Jason Alexander, is an American actor, writer, comedian, television director, producer, and singer. He is best known for his role as George Costanza on the television series Seinfeld, appearing in the sitcom from 1989 to 1998...

. He has variously been described as a "short, stocky, slow-witted, bald man" (by Elaine Benes

Elaine Benes

Elaine Marie Benes is a fictional character on the American television sitcom Seinfeld , played by Julia Louis-Dreyfus. Elaine's best friend is her ex-boyfriend Jerry Seinfeld; she is also good friends with George Costanza and Cosmo Kramer...

 and Costanza himself

The Andrea Doria

"The Andrea Doria" is the 144th episode of American television sitcom Seinfeld. This was the 10th episode for the 8th season. It aired on NBC on December 19, 1996.-Plot:George is excited about the new apartment he is going to move into...

), "Lord of the Idiots

The Apartment (Seinfeld episode)

"The Apartment" is the fifth episode of the second season of the NBC sitcom Seinfeld and the show's tenth episode overall. In the episode, protagonist Jerry Seinfeld gets his ex-girlfriend Elaine Benes an apartment above his, but regrets this after realizing it might be uncomfortable living so...

" (by Costanza himself), and as "the greatest sitcom character of all time". He is friends with Jerry Seinfeld

Jerry Seinfeld (character)

Jerome "Jerry" Seinfeld is the main protagonist of the American television sitcom Seinfeld . The straight man among his group of friends, this semi-fictionalized version of comedian Jerry Seinfeld was named after, co-created by, based on, and played by Seinfeld himself.The series revolves around...

, Cosmo Kramer

Cosmo Kramer

Cosmo Kramer, usually referred to as simply "Kramer", is a fictional character on the American television sitcom Seinfeld , played by Michael Richards...

, and Elaine Benes

Elaine Benes

Elaine Marie Benes is a fictional character on the American television sitcom Seinfeld , played by Julia Louis-Dreyfus. Elaine's best friend is her ex-boyfriend Jerry Seinfeld; she is also good friends with George Costanza and Cosmo Kramer...

. George appears in every episode except for "The Pen

The Pen

"The Pen" is the twentieth episode of Seinfeld. The episode was the third episode of the third season. It aired on October 2, 1991. This is the only episode in which both George and Kramer do not appear.-Plot:...

" (third season). The character was originally based on Seinfeld co-creator Larry David

Larry David

Lawrence Gene "Larry" David is an American actor, writer, comedian and producer. He is best known as the co-creator , head writer, and executive producer of the television series Seinfeld from 1989 to 1996, and for creating the 1999 HBO series Curb Your Enthusiasm, a partially improvised sitcom in...

, but surnamed after Jerry Seinfeld's real-life New York friend, Mike Costanza.
George is the son of Frank Costanza (Jerry Stiller

Jerry Stiller

Gerald Isaac "Jerry" Stiller is an American comedian and actor.He spent many years in the comedy team Stiller and Meara with his wife Anne Meara...

) and Estelle Costanza (Estelle Harris

Estelle Harris

Estelle Harris is an American stand-up comedienne, actress, voice artist, and comedienne, often recognized for her shrill, grating voice. She is best known for her role as Estelle Costanza on Seinfeld from 1992 to 1998, as the voice of Mrs...

).