Knut Nystedt (3 September 1915 – 8 December 2014) was a Norwegian orchestral and choral composer.

Nystedt was born in Kristiania (now Oslo), Norway, and grew up in a Christian home where hymns and classical music were an important part of everyday life.

His major compositions for choir and vocal soloists are mainly based on texts from the Bible or sacred themes.

Key Nystedt works include the symphony Apocalypsis Joannis for soloists, choir and orchestra, op.

In 1965, De Profundis was bestowed with the Work of the Year award of the Norwegian Society of Composers.