Éric Alfred Leslie Satie (Honfleur, 17 May 1866 – Paris, 1 July 1925) was a French composer and pianist. Starting with his first composition in 1884, he signed his name as Erik Satie.

Satie was introduced as a "gymnopedist" in 1887, shortly before writing his most famous compositions, the Gymnopédies. Later, he also referred to himself as a "phonometrician" (meaning "someone who measures sounds") preferring this designation to that of "musician", after having been called "a clumsy but subtle technician" in a book on contemporary French composers published in 1911.

In addition to his body of music, Satie also left a remarkable set of writings, having contributed work for a range of publications, from the dadaist 391 to the American Vanity Fair. Although in later life he prided himself on always publishing his work under his own name, in the late nineteenth century he appears to have used pseudonyms such as Virginie Lebeau and François de Paule in some of his published writings.

Satie was a colourful figure in the early 20th century Parisian avant-garde. He was a precursor to later artistic movements such as minimalism, repetitive music, and the Theatre of the Absurd.