What is the name of President Bartlet's youngest daughter?

President Bartlet's youngest daughter is Zoey Bartlet. Her full name is Zoey Patricia Bartlet, and Elisabeth Moss portrays her throughout The West Wing.

Zoey is the youngest of Jed and Abbey Bartlet's three daughters. Her older sisters are Ellie Bartlet, the middle daughter, and Liz Bartlet Westin, the eldest. That family order is the key to avoiding a common mix-up: Ellie is a doctor and medical researcher, while Liz is the politically ambitious eldest daughter.

Zoey's most prominent storyline involves her relationship with Charlie Young, the President's personal aide. Their romance develops across the series, combining White House security concerns with the complications of dating the President's daughter. Zoey also becomes central to the dramatic season-four finale, when she is abducted during her father's second inauguration celebrations.

The character appears in seasons 1–2 and 4–7. Her disappearance is why she is absent from much of season three, although the event remains an important part of the show's continuing story.