Minas Tirith ( /ˈmɪnəs ˈtɪrɪθ/; Sindarin: /ˈminas ˈtiriθ/), originally named Minas Anor, is a fictional city and castle in J. R. R. Tolkien's Middle-earth writings. It became the heavily fortified capital of Gondor in the second half of the Third Age. It was originally built to guard the former capital, Osgiliath, from attack from the west, but became the capital when Osgiliath fell into ruin following the Kin-strife and the Great Plague. It is often referred to as the White City (though that name is not in the book) and the City of the Kings. The Rohirrim sometimes translated this into their own language as "the Mundburg". In the climax of The Lord of the Rings the city comes under a very large and determined attack by the allied forces of Mordor.

Tolkien described Minas Tirith as built on a hill, called the Hill of Guard, right against the face of Mount Mindolluin. The city looked eastward over the Pelennor Fields, which were used for farmland, toward Osgiliath, the former capital of Gondor that Minas Tirith replaced.