Keith Buchanan (born 11 May 1973) is a Democratic Unionist Party (DUP) politician who has been a Member of the Northern Ireland Assembly (MLA) for Mid Ulster since 2016.

He serves as the party's Chief Whip in the Northern Ireland Assembly as well as its spokesperson for Cultural Development and Loyal Order and Groups Engagement.

[1] He contested the Westminster seat of Mid Ulster for the DUP at the 2024 United Kingdom general election finishing second with 20.2% of the vote.

[3] In November 2021, he was called "disgraceful" by a fellow MLA for attempting to link the Gaelic Athletic Association to dissident Irish republicans.

SDLP MLA Justin McNulty accused Buchanan of "stirring up the pot of sectarian tensions".