Carles Buïgas i Sans (18 January 1898 in Barcelona – 27 August 1979 in Cerdanyola del Vallès) was a Catalan architect, engineer, inventor and author.
In 1922 Buïgas designed his first project with illuminated water fountains for the Royal Palace of Pedralbes.
His most famous work is the Magic Fountain of Montjuic, created for the International Exposition in Barcelona in 1929.
In 1955, he designed the Teatro del Aqua y Luz for the international fair in Santo Domingo.
He spent the last years of his life in Cerdanyola del Vallès, where he died and is buried.