Tate Britain is an art museum located in London, England. It is part of the Tate network of museums that includes Tate Modern, Tate Liverpool, Tate St. Ives, and the online platform Tate Collectives.

Tate Britain's collection focuses on British art from the 16th century to the present day, including paintings, sculptures, drawings, prints, and photographs. The museum has a particularly strong collection of works from the 18th century, including pieces by William Hogarth, Joshua Reynolds, and Thomas Gainsborough. The collection also features works by pre-Raphaelite artists such as Dante Gabriel Rossetti and John Everett Millais, as well as contemporary artists like Damien Hirst and Tracey Emin.

The museum's building was originally designed as the National Gallery of British Art in the late 19th century by Sidney R. J. Smith. It was renamed the Tate Gallery in 1932 after sugar magnate Sir Henry Tate, who donated his collection of British art to the nation. The building has been expanded and renovated several times, most recently in 2013, when a new rotunda was added to the main entrance.

In addition to its permanent collection, Tate Britain hosts temporary exhibitions throughout the year, as well as a range of educational programs, talks, and events. Admission to the museum is free, though some special exhibitions may have an admission fee.