William Bell Scott was a Scottish artist in oils and watercolour and occasionally printmaking. He was also a poet and art teacher, and his posthumously published reminiscences give a chatty and often vivid picture of life in the circle of the Pre-Raphaelites; he was especially close to Dante Gabriel Rossetti. After growing up in Edinburgh, he moved to London, and from 1843 to 1864 was principal of the government School of Art in Newcastle upon Tyne, where he added industrial subjects to his repertoire of landscapes and history painting. He was one of the first British artists to extensively depict the processes of the Industrial Revolution. He returned to London, working for the Science and Art Department until 1885.

He painted a cycle of historical subjects mixed with scenes from modern industry for Wallington Hall in Northumberland (now National Trust), his best known works, and a purely historical cycle for Penkill Castle in Ayrshire in Scotland.

He did not paint many portraits, but his striking portrait of his friend Algernon Charles Swinburne is the iconic image of the poet. His etchings were mostly designed to illustrate his books.

The son of Robert Scott (1777–1841), the engraver, and brother of David Scott, the painter, he was born in Edinburgh. While a young man he studied art and assisted his father, and he published verses in the Scottish magazines.

In 1837, Scott went to London. There he became sufficiently well known as an artist to be appointed in 1844 master of the government school of design at Newcastle-on-Tyne. He held the post for twenty years, and did work in organizing art-teaching and examining under the Science and Art Department. In Newcastle, Scott was visited by all the Rossetti family, and Dante Gabriel Rossetti painted Maria Leathart's portrait at Scott's house 14 St Thomas' Crescent (plaque erected 2005). Algernon Charles Swinburne, who wrote two poems to Scott, spent much time with him in Newcastle after being sent down from Oxford.

After 1870 Scott was much in London, where he bought a house in Chelsea, and he was an intimate friend of Dante Gabriel Rossetti and in high repute as an artist and an author. He was, however, at daggers drawn with John Ruskin.

He resigned his appointment under the Science and Art Department in 1885, and from then until his death he was mainly occupied in writing his reminiscences, Autobiographical Notes, which were published posthumously in 1892, with a memoir by Professor Minto. It is for his connection with Rossetti's circle that Bell Scott will be chiefly remembered.