Nicolas Lebègue (also Le Bègue; c. 1631 – 6 July 1702) was a French Baroque composer, organist and harpsichordist. He was born in Laon and in the 1650s settled in Paris, quickly establishing himself as one of the best organists of the country. He lived and worked in Paris until his death, but frequently made trips to other cities to consult on organ building and maintenance matters. Lebègue's reputation today rests on his keyboard music. He made particularly important contributions to the development of the French organ school by devising pieces with independent pedal parts and developing the Tierce en taille genre. His oeuvre also includes the earliest published unmeasured preludes, as well as some of the earliest known noëls.