Cornelis Symonszoon Boscoop (or Buschop, Boskop) (died 1573) was a Dutch organist, singer, and composer.
He was organist at the Oude Kerk in Amsterdam in the middle of the 16th century and was one of the predecessors of Jan Pieterszoon Sweelinck in this position.
It was published in a new edition in 1568 in Düsseldorf and was dedicated to the Duke of Brunswick and Lüneburg, Erich II (Calenberg-Göttingen).
The title page of the tenor part bears the following text: "Psalmen Dauid/ Vyfftich/ mit vier partyen/ zeer zuet ende lustich om singen en speelen op verscheiden instrumenten/ gecomponeert door M. Cornelius Buschop".
Some of the psalm settings have melodic and harmonic progressions which are characteristic of late Renaissance innovations.