Editing The West Wing (section)

=== Main cast ===
<!-- Credit order per [[MOS:TVCAST]] -->
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* [[Rob Lowe]] as [[Sam Seaborn]] (seasons 1–4; guest season 7): the [[White House Communications Director|deputy communications director]] to Toby Ziegler. In his time at the White House, Sam is responsible for writing many of Bartlet's speeches. Following the reelection of President Bartlet, he departs the White House to run for Congress. He is recruited to become Santos's deputy chief of staff at the series end.
* [[Moira Kelly]] as [[Mandy Hampton]] (season 1): a media consultant contracted by the Bartlet administration and is Josh Lyman's ex-girlfriend. She departs without explanation following the first season.
* [[Dulé Hill]] as [[Charlie Young]]: originally the [[Personal aide to the President of the United States|personal aide to the president]] and later a deputy special assistant to the chief of staff. He is in a relationship with Zoey Bartlet. At the series end he begins to study law at [[Georgetown Law|Georgetown]].
* [[Allison Janney]] as [[C. J. Cregg]]: the [[White House Press Secretary|press secretary]]. She succeeds Leo McGarry as chief of staff and departs the White House at the end of the Bartlet administration. Post-series, she marries Danny Concannon and has a child.
* [[Richard Schiff]] as [[Toby Ziegler]]: the [[White House Communications Director|communications director]] who writes many of Bartlet's speeches, including both inaugural addresses and many State of the Union addresses. He is fired from the Bartlet [[Administration (government)|administration]] after confessing to illegally leaking highly classified information about a secret space shuttle, though he is pardoned for his crimes at the series' end. He has twin children with his ex-wife, Andrea Wyatt, who is a congresswoman from Maryland.
* [[John Spencer (actor)|John Spencer]] as [[Leo McGarry]]: Bartlet's close personal friend and [[White House Chief of Staff|chief of staff]]. Following a heart attack, he becomes [[counselor to the president]], and later the Democratic candidate for [[Vice President of the United States|vice president]]. He wins but dies before assuming office.
* [[Bradley Whitford]] as [[Josh Lyman]]: the [[White House Deputy Chief of Staff|deputy chief of staff]] to Leo McGarry. Josh later leaves the White House to become the "Santos for President" campaign manager. When Santos is elected, Josh becomes White House Chief of Staff.
* [[Martin Sheen]] as [[Jed Bartlet]]: the [[president of the United States]]. An economist by training, he is a former congressman and governor from [[New Hampshire]] who unexpectedly won the Democratic Party nomination. He suffers from [[multiple sclerosis]], a fact he initially hides from the electorate. Sheen described him as a conglomeration of [[John F. Kennedy]], [[Jimmy Carter]], and [[Bill Clinton]].<ref>{{Cite web|title=Who's Who On The West Wing|url=https://www.empireonline.com/west-wing/whoswho.html|access-date=September 25, 2020|website=Empire Online|archive-date=October 4, 2020|archive-url=https://web.archive.org/web/20201004080347/https://www.empireonline.com/west-wing/whoswho.html|url-status=live}}</ref> He is succeeded by Matt Santos.
* [[Janel Moloney]] as [[Donna Moss]] (seasons 2–7; recurring season 1): the senior assistant to Josh Lyman. She later departs to be a spokesperson for the Russell campaign and then the Santos campaign. Upon Santos's election, she becomes [[Office of the First Lady of the United States|chief of staff to the first lady]].
* [[Stockard Channing]] as [[Abbey Bartlet]] (seasons 3–7; recurring seasons 1–2): the [[First Lady of the United States|First Lady]], Jed's wife, and a physician.
* [[Joshua Malina]] as [[Will Bailey]] (seasons 4–7): initially hired as a speechwriter and moves into the role of deputy communications director. He later becomes [[Chief of Staff to the Vice President of the United States|chief of staff to the vice president]], Russell's campaign manager, and communications director. After the series end he becomes a congressman for [[Oregon]].
* [[Mary McCormack]] as Kate Harper (seasons 6–7; recurring season 5): the [[Deputy National Security Advisor]]. Before the West Wing she was in the [[United States Navy|Navy]], and [[Central Intelligence Agency|CIA]].
* [[Jimmy Smits]] as [[Matt Santos]] (seasons 6–7): a congressman from [[Texas]] who is convinced by Josh Lyman to run for president. He eventually wins the nomination and later the election.
* [[Alan Alda]] as [[Arnold Vinick]] (seasons 6–7): a senator from [[California]] who becomes the Republican nominee for president. After his loss in the general election, he is nominated [[United States Secretary of State|Secretary of State]] by President-elect Santos.
* [[Kristin Chenoweth]] as Annabeth Schott (season 7; recurring season 6): the deputy press secretary and later works on the Santos campaign. At the series end, she is appointed press secretary to the incoming First Lady.