The Ankh-Morpork City Watch is the police force of the fictional city of Ankh-Morpork in the Discworld series by the English writer Terry Pratchett.

The Watch, its growth and development, and its inner workings are explored through a series of eight fantasy novels and one short story. These novels generally feature as the protagonist, the Watch Commander Sam Vimes, and take on the general shape of a crime novel, in which the Watch are called on to solve a mysterious crime. In order of publication, they are; Guards! Guards! (1989), "Theatre of Cruelty" (1993) (a short story), Men at Arms (1993), Feet of Clay (1996), Jingo (1997), The Fifth Elephant (1999), Night Watch (2002), Thud! (2005) and Snuff (2011). Besides these main stories, the Watch, and individual members thereof, appear in some form in many of the other Discworld novels, especially those set in Ankh-Morpork.

The Watch is also the loose inspiration for the 2021 fantasy police procedural television series, The Watch.