Sir Eugene Aynsley Goossens (/ˈɡuːsənz/; 26 May 1893 – 13 June 1962) was an English conductor and composer.

He was born in Camden Town, London, the son of the Belgian conductor and violinist Eugène Goossens (fils, 1867–1958) and Annie Cook, a Carl Rosa Opera Company singer. He was the grandson of the conductor Eugène Goossens (père, 1845–1906; his father and grandfather spelled Eugène with a grave accent; he himself did not). His younger sisters and brothers, all musicians, were Marie, Adolphe, Léon and Sidonie.

Eugene studied music at the age of ten in Bruges, three years later at Liverpool College of Music, and in 1907 in London on a scholarship at the Royal College of Music under composer Charles Villiers Stanford and the violinist Achille Rivarde among others. He won the silver medal of the Worshipful Company of Musicians and was made associate of the Royal College of Music.

He was a first violin in Henry Wood's Queen's Hall Orchestra from 1911 to 1915 and as second violinist a founding member of the Philharmonic Quartet before coming to attention as Thomas Beecham's assistant conductor with a performance of Stanford's opera The Critic (1916). In 1921 he decided to make conducting his career and founded his own orchestra; with this ensemble he made a number of gramophone records for Edison-Bell's Velvet Face label. He gave the British concert premiere of Igor Stravinsky's The Rite of Spring on 7 June 1921 at the Queen's Hall with the composer present.

For nearly a quarter of a century, he accepted positions at U.S. orchestras. At the invitation of George Eastman he was conductor of the Rochester Philharmonic Orchestra from 1923 to 1931. This post also involved teaching at the Eastman School of Music. During the late 1920s he often conducted for Vladimir Rosing's American Opera Company, an organization which grew out of the Eastman School. From 1931 to 1946 he succeeded Fritz Reiner as the conductor of the Cincinnati Symphony Orchestra. In a tribute to Goossens on his departure for Australia, nine American composers collaborated on Variations on a Theme by Eugene Goossens, for orchestra. The composers were Ernest Bloch, Aaron Copland, Paul Creston, Anis Fuleihan, Roy Harris, Walter Piston, Bernard Rogers, Roger Sessions and Deems Taylor, with Goossens himself writing the finale.

Goossens spent nine years in Australia, from 1947 to 1956. There, he enthusiastically lobbied for a new major performing arts theatre, which ultimately led to the creation of the Sydney Opera House.

He conducted the Sydney Symphony Orchestra and other groups, and was the director of the NSW State Conservatorium of Music. He held these positions concurrently until March 1956, when he was forced to resign after a major public scandal, only a year after being knighted.

In the early 1950s, Goossens met Rosaleen Norton, the so-called "Witch of Kings Cross". Norton was known as an artist of the grotesque and for her interest in the occult and erotica, which Goossens secretly shared. They conducted an intense affair, exchanging a number of passionate letters; although Goossens asked Norton to destroy all of them, she kept a bundle hidden behind a sofa.