Editing Seinfeld (section)

===Recurring characters===
{{Main|List of Seinfeld characters}}
Many characters have made multiple appearances, notably Jerry's parents, Morty and Helen Seinfeld, who reside in Florida; George's parents, the overbearing Frank and Estelle Costanza; George's on-again, off-again fiancée Susan Ross; Jerry's [[Uncle Leo]]; Elaine's variety of bosses, Mr. Lippman, Mr. Pitt and J. Peterman; Elaine's on-again, off-again boyfriend David Puddy; and Kramer's friend, [[Newman (Seinfeld)|Newman]], a mail carrier who lives in the same building and is Jerry's nemesis. In addition to recurring characters, ''Seinfeld'' features numerous celebrities who appear as themselves or as girlfriends, boyfriends, bosses, and other acquaintances.

; Seinfeld's girlfriends
A number of actresses made guest appearances as Seinfeld's love interests in single episodes:

* Isabel ([[Tawny Kitaen]]) – "[[The Nose Job]]" (season 3, episode 9)
* Nina ([[Catherine Keener]]) – "[[The Letter (Seinfeld)|The Letter]]" (season 3, episode 20)
* Marla ([[Jane Leeves]]) – "[[The Virgin (Seinfeld)|The Virgin]]" (season 4, episode 10)
* Sidra ([[Teri Hatcher]]) – "[[The Implant]]" (season 4, episode 19)
* Amy ([[Anna Gunn]]) – "[[The Glasses]]" (season 5, episode 3)
* Jody ([[Jennifer Coolidge]]) – "[[The Masseuse (Seinfeld)|The Masseuse]]" (season 5, episode 9)
* Jane ([[Jami Gertz]]) – "[[The Stall]]" (season 5, episode 12)
* Meryl ([[Courteney Cox]]) – "[[The Wife (Seinfeld)|The Wife]]" (season 5, episode 17)
* Margaret ([[Marita Geraghty]]) - "[[The Big Salad]]" (season 6, episode 2)
* Jeannie ([[Janeane Garofalo]]) – "[[The Invitations]]" (season 7, episode 24)
* Ellen ([[Christine Taylor]]) – "[[The Van Buren Boys]]" (season 8, episode 14)
* Jenna ([[Kristin Davis]]) – "[[The Pothole]]" (season 8, episode 16)
* Beth ([[Debra Messing]]) – "[[The Yada Yada]]" (season 8, episode 19)
* Valerie ([[Lauren Graham]]) – "[[The Millennium (Seinfeld)|The Millennium]]" (season 8, episode 20)
* Alex ([[Melinda Clarke]]) – "[[The Muffin Tops]]" (season 8, episode 21)
* Lanette ([[Amanda Peet]]) – "[[The Summer of George]]" (season 8, episode 22)
* Patty ([[Lori Loughlin]]) – "[[The Serenity Now]]" (season 9, episode 3)
* Sara ([[Marcia Cross]]) – "[[The Slicer]]" (season 9, episode 7)