A listed building in the United Kingdom is a building or other structure officially designated as being of special architectural, historical or cultural significance. It is a widely used status, applied to around half a million buildings.

A listed building may not be demolished, extended or altered without special permission from the local planning authority (who typically consult the relevant central government agency, particularly for significant alterations to the more notable listed buildings). Owners of listed buildings are, in some circumstances, compelled to repair and maintain them and can face criminal prosecution if they fail to do so or if they perform unauthorised alterations. Because of this, and because listing can limit the options available for significant expansion or improvement, the law allows for owners of listed buildings to object to the listing.

Although most structures appearing on the lists are buildings, other structures such as bridges, monuments, sculptures, war memorials, and even milestones and mileposts may also be listed. Ancient, military and uninhabited structures (such as Stonehenge) are sometimes instead classified as Scheduled Ancient Monuments and protected by much older legislation whilst cultural landscapes such as parks and gardens are currently "listed" on a non-statutory basis. In England, this complex system may be rationalised under the Heritage Protection Review, see below.

Listing was begun by a provision in the Town and Country Planning Act 1947.