Boris Koutzen (1 April 1901 – 10 December 1966) was a Russian-American violinist composer and music educator.
That same year, he won the national competition for the position of first violin in the State Opera House Orchestra, and later joined the Moscow Symphony Orchestra under Serge Koussevitzky.
In the fall of 1923 Koutzen came to the United States and became a member of the first violin section of the Philadelphia orchestra under Leopold Stokowski.
He died after suffering a heart attack while conducting a dress rehearsal, only a few months after retiring his teaching post at Vassar.
He was survived by his family of musicians: his wife Inez, a pianist, his son George, cellist and administrator of the Little Orchestra Society, and his daughter Nadia, a concert violinist.