This is a list of characters who appeared on Seinfeld. This list features only characters who appeared in main roles or multiple episodes; those that appeared in only one are not included here.
Ada (played by ) – George's secretary at the New York Yankees. In the episode "The Secretary", George does not want to hire an attractive secretary so he could focus on his work, and in the interview process turned down a few women because they were so attractive. George ultimately hired Ada, whose efficiency impressed him. One day at work together, George becomes attracted to Ada, and the two make love. While having sex George blurts out that he's giving Ada a raise. Ada receives the raise, but it turns out that her new salary is higher than George's, much to his annoyance. In "The Race", Ada overhears George on the phone with a woman he met through The Daily Worker, and believes George is a communist. She tells Steinbrenner about this but instead of reprimanding him, Steinbrenner sends George to Cuba to recruit Cuban baseball players.
Vicki Lewis
Allison (played by Kari Coleman) – George's ex-girlfriend who he claims is obsessed with him, proven by the fact that she threatened to kill herself if George broke up with her. In the end of the episode "The Smelly Car", Allison compliments the vest of George's other ex-girlfriend, Susan, with whom she is seen watching the pilot program in a later episode, "The Pilot".
